Recall record at a glance
| Official record | Z-0771-2019 |
|---|---|
| Category | Medical Device Recalls |
| Classification | Class II |
| FDA record status | Terminated |
| Recalling firm | Varian Medical Systems, Inc. |
| Report date | Jan 30, 2019 |
| Recall initiation date | Dec 26, 2018 |
| Quantity | 1450 devices |
| Location | Palo Alto, CA, United States |
Official product description
Eclipse(TM) Treatment Planning System with Proton Convolution Superposition algorithm license only The Eclipse Treatment Planning System (Eclipse TPS) is used to plan radiotherapy treatments for patients with malignant or benign diseases. Eclipse TPS is used to plan external beam irradiation with photon, elec- tron and proton beams, as well as for internal irradiation (brachytherapy) treatments. In addition, the Eclipse Proton Eye algorithm is specifically indicated for planning proton treatment of neoplasms of the eye.
Why the product was recalled
There is an anomaly with the Eclipse(TM) Treatment Planning System [TPS] Proton Convolution Superposition [PCS] dose calculation algorithm. The PCS algo- rithm calculates the water equivalent range incorrectly for non-square 3D CT images (either different number of pixels in X and Y, or non-square pixels). Before the dose is calculated, Eclipse resamples the CT images to create a calculation image with a maximum resolution of 256 x 256. The PCS algorithm assumes uniform resolution in X and Y directions, or that X = Y for all images, and erroneously sets the Y = X for dose calcu- lation. For images that are not square, where either X<>Y, or the length of X does not equal the length of Y, the computed water equivalent range R is erroneous compared to the correct range R: 1) X=Y; R =R (R is correct); 2) X<Y: R <R (R is too small) and 3) X>Y R >R (R is too big).
Distribution information
Worldwide distribution: US (nationwide) and countries of: Australia, Brazil, Denmark France, Germany, Japan, Poland, Russia, Saudi Arabia, Singapore, Slovakia, South Africa, South Korea, Sweden, Switzerland, Taiwan, and United Kingdom.
How to read the classification
FDA Class II indicates a situation in which use of or exposure to the product may cause temporary or medically reversible adverse health consequences, or where the probability of serious consequences is remote. The classification shown here comes from the FDA record.
Additional record details
Recall type: Voluntary: Firm initiated. Initial notification: Letter.
What to do next
If you believe you have the recalled product, use the recall number and firm information above to confirm the official notice and follow the instructions issued by the FDA, recalling firm, retailer or product manufacturer. For drugs and medical devices, decisions about treatment or medical care should be discussed with a qualified health professional.
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