Korean math, again

Another non-sensical fluff piece sponsored by Nanox:

Nanox said that its Yongin plant will be annually producing 220,000 MEMS chips, enough to make 50,000 Nanox.ARC devices. The temporary facility in Cheongju currently has a monthly production capacity of 1,000 MEMS chips.

That is interesting.  220,000 divided by 50,000 is 4.4.  In other words, each Arc device will have 4 tubes and another very special partial ( 4/10, exactly) tube, just short of the 5 tubes in the investor presentations.   Also, Nanox has not disclosed any plans to make 50,000 Arc devices (only 15,000 by 2024).

The capacity is also wrong  - it was supposed to be 120,000 (based on the 10,000 a month from inventor presentations).

Here is the Korean text, in case of doubt.

The equipment shown in the article's photo appears to be Precision 5000 by Applied Materials, an almost 40-year-old CVD machine - baking the very innovative fake Nanox.Source!  Let me know, if I am mistaken.  

To make this fit into the hole for this

Nanox tube video exposes a problem with the fake 25 Nanox.Arc devices that Nanox claimed to have completed, and the 1,000 devices for which it claimed to have sourced all the metal parts.

Here are the holes for the x-ray tubes in the devices (3 shown, out of 5 holes).  Nanox never filled those holes with tubes.  

https://twitter.com/nanox_vision/status/1384873902766231557

And here is the new Nanox tube.

Nanox has to find a way to make this glass tube fit into the hole and housing (head) designed for the fake ceramic tube, which was shorter and which had an x-ray exit flange closer to the cathode end.  By just looking at it, drilling new holes, manufacturing an adapter, and repositioning (tilting/rotating) the tubes won't be enough - substantially the entire metal enclosure needs to be redesigned, manufactured, and reassembled.

NASA may have had an easier job.

"We gotta find a way to make this fit into the hole for this using nothing but that.”
a scene from Apollo 13 (1995):

Modern tube production, according to Nanox

Nanox shows how a modern tube production facility looks like in the new "tube" video on its website (an exact copy of the video leaked a few days ago).  No comments should be necessary.

Rust, paper, damaged insulation, and a bare hand contaminating a mystery tube element that appears to be checked for continuity with an incandescent (hot-filament) lightbulb.  But can you blame the poor CEI?  The Chinese competition has copied its tubes and offers them at half the price, at about $100 on Alibaba (Kailong's catalog, pages 4,5).  CEI claims to have spent 600,000EUR on technology since 2014 "for expanding the range of products and for reducing tubes costs."  Apparently, that wasn't enough.

Update May 1, 2022:  Nanox rereleased this video on YouTube, then it made it private recently (sometime earlier this year, I believe), and now it still lists it in the media section of its website.  Clearly, CEI is no longer a tube OEM partner of Nanox, having failed to produce even one working Nanox tube, just like everyone else who has ever tried (not a surprise, since the core component, the Nanox.SOURCE chip, is simply fake).

One of the many problems with this video, other than the fake tubes, is that it reveals Nanox own confusion about its core technology, the Nanox.SOURCE chip.  For example, here Nanox claims that its fake Nanox.SOURCE chip is a "novel digital x-ray source."   Yet its technical white paper describes the chip as a source of electrons.  Electrons are quite different from x-rays, which happen to be photons.  And, of course, there is nothing novel or digital about it - this is a failed 1970s technology (Spindt array) and the x-rays made by a tube using it is just as analog as any other x-ray tube - electrons gets smashed indiscriminately into a metal target to make x-rays.

This head here has this tube inside

The CEO got caught lying again, and the RSNA 2020 demo was fake.  

On the Q1 results call today, the CEO revealed that the Nanox.Cart device that received FDA clearance has a glass tube, not a ceramic tube.  But at the RSNA 2020 he said (about 5:27 into the video stream):

... this head here has this tube inside...

He was, of course, holding a ceramic tube, not a glass tube.  He now says Nanox is experiencing delays in manufacturing of said ceramic tube.

But maybe the head belongs to some other Nanox.Cart, not the one submitted for clearance?  Well, no.  Next to the device there is a sign saying "pending 510(k) clearance" and the Nanox.Cart is the only Nanox device ever submitted for clearance.

The Nanox.Cart is the only device submitted clearance

And we confirm again with Slide 22 from the April 2021 investor presentation that the ugly device with the enormous head containing "cooling fluid" is the Nanox.Cart.

The curious case of Nanox.Arc's development

Last week @Ehlyz on Yahoo linked to a webpage of the engineering firm Ziv-Av and wrote:

If you are still worried this company is fraud and there is no end product to sell, take a look at who is building their CT scanner, Ziv-Av, who is also a vendor for Mazor Robotics and other medical companies.

Sure enough, the engineering firm Ziv-Av claims that the Nanox.Arc device was developed by Ziv-Av's engineers, not by Nanox (Nanox supposedly only contributed a proposed x-ray source).

According to the webpage, published sometime in 2020 prior to Nanox IPO, Nanox.Arc is a revolutionary x-ray device that could do anything the current technology could, but it is smaller, more mobile, and at least 1/100 as affordable.  The device was developed in record time - just 3 months, from scratch and for peanuts (Nanox shows in its prospectus on page 9 less than $3 million in research and development expenses for the entire 2019).  It was this working prototype that supposedly led to the equity raise and Foxconn "endorsement" in January 2020.

The problem is that that the device shown on the webpage (Nanox.Arc version 1.0, according to Nanox tech webpage) is completely fake.  It cannot take any x-ray images because it does not have any x-ray tubes and any x-ray detectors.  It only has a battery and blue LED lights - no need for the special cooling system that Ziv-Av claims to have developed.   

Ziv-Av's claim that this was a "working" prototype also contradicts the draft registration statement that Nanox did not have a working prototype prior to February 2020 (that is, the equity raise in January 2020 must have occurred without a working prototype):

We have not produced a working prototype of the Nanox.Arc (page 9) 

Moreover, if the working prototype looked like what Ziv-Av is showing, then the device in the demo to Foxconn in December 2019 shown below must have used a non-working prototype - that is, the demo was fake.

device demoed to Foxconn, December 2019

Here is the list of all the false and weird claims by Ziv-Av on that webpage:

1.  Ziv-Av develops revolutionary and affordable CT scanner for Nanox

Nope, even if the device were not fake, it cannot be used as a CT scanner due to limited number of projections (a CT scan uses hundreds of projections at different angles per arc/rotation).  It is affordable only because it is completely fake. 

2.  Nanox is a medical imaging company which has developed a revolutionary CT device that is mobile, substantially smaller and extremely cheaper than the existing devices. 

Nanox now denies that its proposed concept device is a CT device, and says it is a tomosynthesis device (unable to generate axial slices).  The device is cheap only because it is fake - the main cost of a real device would be in the detector.

3.  Nanox’s CT technology is based on digital X-ray production using a MEMS component instead of conventional flame lamps enabling cost reduction by orders of magnitude. 

There is no such thing as digital x-ray production - the proposed Nanox x-ray source generates x-rays the same way as a regular $100 hot-cathode x-ray tube - by smashing a bunch of electrons into a metal target.  And the cost of a Nanox tube will always be higher than a regular x-ray tube of the same performance, as any non-defective chip will cost more to make than a filament (a piece of wire).  It is also apparent that Ziv-Av believes x-rays are generated by conventional flame lamps - not clear whether burning kerosene or lamp oil.

conventional x-ray tube per Ziv-Av ( image source: https://www.freeimages.com/photo/the-oil-lamp-3-1535516 )

4.  The device supports scans such as CT, mammography, fluoroscopy and angiography.

Nanox now denies the CT and mammography "support" (CT-like imagining with 11 sources is now a simulation only).  Fluoroscopy and angiography are still on the table for the concept device, but they would be extremely limited, as its device lacks the positional flexibility of modern low-cost C-arm devices.

5.  Ziv-Av engineers revolutionized the medical imaging system 

Nope - the medical imaging system is still the same.

6.  Nanox approached Ziv-Av for the design of the revolutionary digital X-ray machine and its prototype within a stringent timeline of three months.

This may actually be true.  But the only revolutionary thing was the complete fakeness of the device. 

7.  Among many other design features, Ziv-Av designed the arch of the scanner which scans the patient’s body from different angles. 

Oh, so the Arc idea came from Ziv-Av rather than Nanox...

8.  The arch is designed to work with a very high voltage of 70,000V which creates immense heat. 

The statement that 70kV is associated with immense heat shows that Ziv-Av engineers do not understand basic physics and engineering.  An x-ray tube that operates at 1mA generates less heat than a 100W lightbulb.  Also, 70kV tube voltage is too low for a general x-ray device (it could be ok for extremities). 

this lightbulb generates immense heat per Ziv-Av (image source: https://www.freeimages.com/photo/light-bulb-1531205 ) 

9.  Ziv-Av managed the heat dissipation by designing a cooling system. 

The cooling system in the device is fake and not needed, as there is no x-ray source.  Subsequent proposed device iterations by Nanox show that the proposed "cooling system" is just a CNC-cut metal slab - a simple, and not very effective, heat sink.

 

10.  Along with the arch of this amazing machine, Ziv-Av also provided the design of the machine’s table, mechanics, electricity, electronics and motion control system .

Wow - so the only thing that Nanox has developed was the proposed x-ray source, and everything else (fake, of course) came from Ziv-Av? 

11.  Through its specialists, Ziv-Av achieved a significant cost-reduction – realizing Nanox’ vision of affordability to all.

True.  A fake device without an x-ray source or a detector or even a high-voltage generator would be cheap and affordable, indeed.  And, as a plus, it does not even require radiation shielding.  The only downside - it can generate no images.

12.  Ziv-Av excels in cost-effective prototype production.  Ziv-Av’s multidisciplinary engineers provided a turnkey solution from design to production of this innovative machine. 

It is innovative and cost-effective, as it is completely fake - a rarity!

12.  All the production, assembly & integration and tests were performed in Ziv-Av’s well-equipped workshop. 

No doubt.  Again, Nanox only contributed a proposed (fake) x-ray source.  

13.  The demonstrations of this perfectly working prototype helped Nanox raise $26 million within three months from many investors including ‘Foxconn-the IT industry giant’. 

By perfectly working, Ziv-Av means it can light up in blue using the built-in LEDs and a 12V battery, of course.

14.  From scratch to a revolutionary, cost-effective design as well as a working prototype – Ziv-Av accomplished all in just 3 months.

Nice.

What the webpage does not say is that the engineering firm's owner, Mr. Ziv-Av, at some point a chief scientist of the Israeli Ministry of Transportation, was convicted of securities fraud and then claimed that he did not know what he was doing.

Update:  Apparently, a Nanox promoter also tweeted about Ziv-Av last week, transforming CT or computed tomography into "3d tomo" (tomo simply means slice in greek), falsely claiming that a single (non-axial) slice meant CT-like capability, and insisting 70kV or less is not a problem for chest:

Chest/lung, musculoskeletal including skull likely on this 510(k) w/ enhanced 3D, slices, plus 2D x-ray. Cheap device. Will expand market.

Yeah, will expand the market with a completely fake device.

Update December 20, 2021:  Minor spelling correction.  

Another confirmation that Nanox.Arc is fake

Nanox tweets a short video today, confirming that Nanox.Arc is a non-functional fake "future product," rather than a real device in production.  So much for the 25 devices that were supposed to have already been made in March - they must have been all fake, too. 

 

Notice how the two assemblers just carry the arc with the empty tube housing and mount it on the device base.  No x-ray tubes means the device is non-functional and fake. 

The device also appears to lack a detector - the table is put directly over where the detector should have been.  Just another reason why the device cannot take any images and is fake.

But the two 12V batteries in the base below where the missing detector should have been may be real.

More later.

Lost in translation

According to a recent Google-translated Korean article about the planned fab, or factory, Nanox plans to make only 2,000 x-ray tubes a month.  

The investment is about 40 million dollars... Nanox plans to produce about 2,000 semiconductor chips and tubes per month for digital X-rays at [the planned Korean] factory. (google translated)

Something must be wrong with the translation by Google.  Making only 2,000 tubes a month means that the cost can never get to $100 a piece, a cost that would be competitive with regular Chinese tubes of equivalent power/performance.

from Slide 15, January 2020 investor presentation  

Here is the simple math:  Recouping just the capital investment at a $100 cost would require making 400,000 non-defective tubes, which would take over 16 years (given the supposed plan for 24,000 tubes a year ).  So, a $100 Nanox tube would not be possible with this fab, if the translated article is correct.

In an interview in September 2020, the CEO told a different story about that same planned fab:

We are shooting for quite a large capacity because we think that Nanox eventually will be in many, many devices, so we are planning for about 1,000 wafers per month (about 5:30 into the video).

Depending on the wafer size and layout, a real company making real MEMS chips of similar size, should get from less than 100 to nearly 200 chips per wafer, or about 40-100 non-defective chips per wafer (assuming yield of 40% and over).

Nanox wafers, annual report, page 66 

But what is Nanox going to do with over one million non-defective chips a year (or over three million by end of 2024)?  All the planned 15,000 Nanox.Arc devices by end of 2024 need only 75,000 to 165,000 tubes in total (depending on whether 5 or 11 tubes per proposed device).  There are only about "500,000 plus" x-ray imaging systems in the world (page 11, Varex filing)

News in Nanox annual report

What's news and notable in Nanox annual report, relative to the Prospectus filed in February? 

Material weakness

We have identified a material weakness in our internal control over financial reporting in connection with the audit of our financial statements as of and for the years ended December 31, 2019 and 2020. (page 49)

Oops.  That's even before any revenues are recognized.

Dangling chips 

 As mentioned above, we currently manufacture the MEMs X-ray chips in the clean rooms located in Tokyo, Japan (page 15)

Nothing like it is mentioned above (in the annual report).  The rest of the statement, of course, is also false - the clean rooms located in Tokyo, Japan do not allow commercial use, and therefore Nanox cannot manufacture the proposed "digital" x-ray source that relies on those chips (and, in reality, there is nothing digital or MEMs about them).

 

No working Nanox.Arc

Although we have produced a working prototype of the Nanox.ARC and developed a prototype of the Nanox.CLOUD, we have not produced any of the approximately 15,000 Nanox.ARC units planned for the initial global deployment under the contract manufacturing agreement with FoxSemicon Integrated Technology, Inc., a subsidiary of Foxconn (“FITI”).  (page 7)

So, one working prototype of Nanox.CART, the one that got cleared?   But no working prototypes of Nanox.Arc?  Is this an admission, finally, that the RSNA 2020 demo of the Nanox.Arc was faked?  Why couldn't Nanox complete even one of the 10 prototypes that Nanox was supposedly assembling in November 2020 (according to the Q3 2020 results call)?  What happened to those mock-ups in all these production photos pushed by Nanox and its promoters this year?

A side note here:  Nanox never signed an agreement with FITI, according to the text of the contract manufacturing agreement.  The agreement was signed with a Japanese company that is not a Nanox subsidiary, according to public corporate records.

No ceramic tubes

We are evaluating, subject to completion of testing, a transition from glass-based X-ray tubes to ceramics-based tubes for cost efficiency purposes, which are the tubes to be used in the multi-source version of the Nanox.ARC, and we intend to enter into an agreement for such ceramics-based tubes with a new manufacturer in the future. (page 14)

That is, Nanox still cannot manufacture the ceramic tubes that the CEO claimed were used at the RSNA 2020 demo of both the Nanox.Cart and Nanox.Arc.  So, the RSNA 2020 demo was fake and the FDA 510(k) submission may have been fraudulent.

Fuji is out

We have not entered into any licensing agreements; however, we expect to enter into negotiations regarding a commercial arrangement with FUJIFILM Corporation for the licensing of our Nanox System. Any of the above factors may negatively affect the implementation of our Licensing Model, or cause our Licensing Model to fail. (page 12)

This is an admission that Fuji is not a Nanox Mamography OEM (that is, all Nanox investor presentations so far have been misleading ).  In the Prospectus, Nanox still falsely claimed:  

We are currently discussing the terms of a potential commercial agreement with FUJIFILM Corporation.

Chinese tubes 

We have, and expect to enter into, agreements with manufacturers and/or suppliers in China for the production of our X-ray tube, the Nanox.ARC and some of their respective components. (page 23)

Is this an admission that Nanox is using a regular low-cost, low-quality, hot-cathode Chinese x-ray tube and calling it "digital?"

 

A confused FDA: Cart or Arc

 

... we submitted a 510(k) premarket notification for the Nanox Cart X-Ray System... in January 2020... On January 30, 2021, we received additional information requests from the FDA which, among other things, require us to address certain deficiencies and questions, including requests that we provide additional support regarding the intended use of the Nanox.ARC and the comparability of the Nanox.ARC to the predicate device. We submitted our response to these requests on March 1, 2021. On April 1, 2021, we received clearance from the FDA to market our Nanox Cart X-Ray System. ...we may seek alternatives for commercialization of our Nanox Cart X-Ray System.  (page 32) 

Why was the FDA asking about Nanox.Arc in January 2021?  The device that got submitted and eventually got clearance is Nanox Cart X-Ray System, that is, the ugly Nanox.Cart, not the fake Nanox.Arc. The FDA should have asked about Nanox Cart X-Ray System, no?

Nanox also confirms that it still has no plans the market/commercialize the Nanox Cart X-Ray System even after its pre-market notification got cleared.

Update:  Muddy Waters tweets about Gilad Yron, the Chief Business Officer, no longer counting as an executive, which I missed (it is not clear what his current role is, if any). 

Update April 8, 2021:  Fixed some spelling.  Also, the Nanox.Cloud prototype developed by Nanox is just a collection of a few mock-up screens that use stolen images and contain non-sensical findings.  

Another weird press release

 According to the today's press release,  

Nanox is Scaling up Semiconductor Fabrication Plant in South Korea in light of Increased Demand

and

Nano-X Korean Inc, ... boosts construction to support key source manufacturing in light of growth in global demand

So, Nanox already has a fabrication plant, but is now scaling it up, and actually boosting the construction of a new plant, to meet increased demand for its products?

Turns out, none of the above.

The press release explains down below that the plant or FAB is only in the planning stage, and no construction has began.  It is just a piece of barren land and a nice design.  The CEO further hedges that there is no demand, but just a "growing interest in demand," whatever that means.  Clearly, demand is zero, as the product has no regulatory clearance (it is, in fact, fake, after all).  He also seems to admit that the company is "undergoing a smooth transition from development to manufacturing."  Meaning, there is no manufacturing.

Investors also learn that Dr. Ilung (IU) Kim is now a Chairman of Nano-X Korean Inc.  He had previously been introduced by Nanox as a President of SK Telecom (Hong Kong Office) just before his RSNA 2020 testimony disappeared.  He was not considered an executive officer or part of the management team as late last last month, based on the prospectus and latest (January) slide deck.  In a press release by another company, he was introduced in February as the president of SK Telecom, ICT committee.  Eli Reifman, the convicted felon, claims to be a marketing manager at that company.

So, Dr. Kim states:

Scaling up the production line to meet market demand is one of our main priorities, as we would like to see the Nanox.ARC systems tested and operating globally as soon as possible

But, again, how can a production line be scaled, if it does not exist yet.  Why do you need a production line, if all you need a is a few units to be tested?  Didn't Nanox assemble 10 such systems in November, per investor call, and all of them have now vanished, per latest investor call?

Nanox claims in its prospectus to be manufacturing the chips of the cold cathodes in the clean rooms at University of Tokyo in Japan using its own equipment, but that is a lie because the University prohibits commercial use and all the equipment belongs to the University.  So, the novel cold-cathode x-ray source is just a figment of Nanox imagination, as of today, yet Nanox claims that the device it has submitted for clearance uses that source.  I wonder what the FDA thinks of that.

Update March 11, 2021:  The Kim/Reifman connection was first pointed out to me by Steve @ Yahoo.  

Update March 22, 2021:  TerraPharma1 @ Twitter found the FAB project on the website of the reputable Korean architectural and construction management firm Samoo C.M.  Turns out the actual design/plan is different from what Nanox and its promoters have been posting.

The parcel covers about 10,000 square meters, while the building is about 4,000 square meters, per Samoo.  Nanox claims to have paid $6.2 million for the land, per Prospectus, page F-34 (which seems on the high side - who sold the land to Nanox?). The project is supposed to be completed in October this year.  The parcel is located at about 37.1527, 127.2995 , closely in line with the coordinates first published by BH @ Yahoo.com in February.

Numerous discrepancies are visible - The Nanox and Samoo designs are essentially two different designs:

• a long ramp A in Samoo vs very short one in Nanox.
• a cut in section B in Samoo vs no cut in Nanox, and section B is shorter than then middle section in Samoo vs taller than the middle section in Nanox
• section C is same height as middle section in Samoo, but shorter in Nanox.  Shape is different.
• section D is equal height to the middle section in Samoo, but taller in Nanox

If Nanox were serious about getting 150,000 nano-Spindt cold-cathode chips (for the supposed 15,000 ARC units), it won't be building a new fab anyway.

Update April 19, 2021;  Someone posted on twitter the info about the permit for the building granted on April 15.

After OCR and google translate:

경기도 용인시 처인구 원삼면 학일리 원삼 일반산업단지 산업-2

허가구분               신축허가          허가/신고일              20210415

건축면적(m2)            2208.43          대지면적(m2)             11124

연면적(m2)              4810.1

주용도                 공장              기타용도

착공구분         미착공       착공예정

실착공일

사용승인구분                 사용승인일

Industry-2, Wonsam General Industrial Complex, Hakil-ri, Wonsam-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do

Permit Category New Construction Permit Permit/Report Date 20210415

Building area (sq meters) 2,208.43  Site area (sq meters) 11,124

Total Area(sq meters) 4810.1

Main use Factory other use

Start of construction Classification Not to be started Construction scheduled to start

Actual date of arrival

Use approval category Use approval date

Update October 15, 2021:  The Nanox design appears closer to what is on the ground so far.  Images below are snapshots from recent TV footage.

Yes, We sCam!

 

Nanox tweets an interesting excerpt today, stating that the company 

has already made 25 of its ARC systems at a partner facility in Israel.

It is interesting, because the CEO and CFO forgot to mention that number three days ago at the investor call, even though they were asked what exactly happened to the 10 prototypes that were supposedly being assembled for partners during the investor call in November 2020.   The latest prospectus, filed February 12, 2021, states on page 1 that the company has only 1 working prototype (even if true, it is likely the ugly single-source device, not shown, here: added March 25, 2021).

Here is the cropped photo from the tweet, showing the supposed 25 systems:

It actually shows 8 Nanox.Arc "systems" only, and none of them is functional (3 don't even have a rudimentary skeleton Arc).

Just another day at Nanox - yes, we scam!

Thanks to K @Yahoo for the slogan idea.

Update (March 12, 2021):  Only one of these 8 unfinished and fake devices looks like the latest version of Nanox.Arc (even though it is very hard to see from this perspective) - 3 don't have an Arc and the other 4 have the black half-arc skeleton of Nanox.Arc 2.0.

Update (March 25, 2021): Another photo surfaces (posted by TerraPharma1 @ Twitter, likely coming from the company - CEO collages it) from the supposed March 16 "company event at the factory [that] celebrated many more devices at the production floor" (Slide 11 and 15:11 into Oppenheimer presentation on March 17, 2020).  Not even one of these devices is completed (to reiterate, the CEO claimed on the November 2020 results call that the company was assembling 10 devices, and latest Prospectus dated February 2021 says only one working prototype, likely the ugly single-source device, even if true) 

Here is the actual March 5 photo (edited by Bloomberg):

And, just so we keep everything together, the one posted by John Nosta @ Twitter
 

The production Nanox.Arc has no detector?

So John Nosta puts a tweet out that shows that Nanox.Arc has no detector, and therefore, cannot make any images.  Stock goes up 15%.

Here is the fake, non-functional device that (supposedly) goes into production, with no clearance or any regulatory approval pending, in all its glory:

John Nosta is the same evangelist who in August 2019 posted the photo of the completely-fake 12V-battery-operated Nanox.Arc 1.0 that could emit electromagnetic waves, but only in the visible spectrum.  According to Nosta, it could fit in a suitcase (it must be a gigantic suitcase!)  and would emit "lower" radiation (which is correct, as visible light is lower in the energy spectrum than x-rays, but can't penetrate most human organs and is therefore useless for diagnostic purposes).  

Update:  In case it is not clear, here is where the detector goes in Nanox.Arc 2.0 (which is the finalized production-ready design, per CEO investor presentation post RSNA 2020 demo).

Cropped snapshot from the Making of Nanox Arc video 

Update:  Added zoomed view of Nanox.Streak and Nanox.Thread:

Update:  Apparently some people are confused where this picture was taken, and believe it is at Foxconn, where the volume production was initially supposed to take place.  The picture was taken in Israel, however (notice the green EXIT sign above the door in Hebrew יְצִיאָה - thanks google translate!).  

Due, in part, to travel restrictions as a result of the COVID-19 pandemic, we expect to manufacture a small number of Nanox.ARC units in Israel on a purchase order basis that will be used for the acceptance tests under our MSaaS agreements, demonstrations, regulatory approvals and for the initial global deployment, among other purposes. (page 5, prospectus)

Update:  Added a link to Nosta's August 2019 tweet and a few words about it.

Update:  Ok, ok, this could be the detector.  Added a question mark to the title of this post...

Update April 21, 2021:  Based on inspection of the latest Nanox video, the device in Nosta's tweet has no detector.  What looked like a possible detector in the view from this angle is likely just a part of the support frame.

zoomed-in snapshot from the new video

Nanox.Arc assembly quality?

This looks like shoddy assembly quality and cheap disintegrating plastic.  Or is the camera lying?  From video titled "The making of Nanox ARC" (about 1:06 into video).

Nanox.Arc is not production-ready

The multiple-source Nanox.Arc "prototype" shown at RSNA2020 supposedly represents what Nanox is "going to make," with the design being 100% finalized (per investor Zoom event following the RSNA 2020 demo, about 55 minutes into it).  However, the device lacks a built-in high-voltage generator necessary to produce any x-rays.  

The CEO says (about 53 minutes into the Zoom) when asked about the location of he high-voltage receptacl: "inside the gantry we have connecting [sic] one by one the tubes into the high-power voltage and all the way to a PCB card that is then connecting to the high-power supply." 

This snapshot from Nanox video titled "The making of Nanox ARC" (about 1:03 into video) shows the black high-voltage cable leading away from the device to a generator that is not visible (and may not even exist).  

Revised: December 21, 2020