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"Investigation of in vivo source tracking error thresholds for intersti" by Yashiv Dookie, Joel Poder et al.

Purpose: The purpose of this study was to determine a comprehensive in vivo source tracking error thresholds in high-dose-rate (HDR) brachytherapy for cervical cancer. Achieving this enables the definition of an action level for imminent in vivo source tracking technologies and treatment monitoring devices, preventing clinically relevant changes to the applied dose. Material and methods: Retrospective HDR interstitial (n = 10) and intra-cavitary (n = 20) cervical brachytherapy patients were randomly selected to determine the feasibility of implementing in vivo source tracking error thresholds. A script was developed to displace all dwell positions in each treatment plan, along all major axes from their original position. Dose-volume histogram (DVH) indices were calculated without re-optimization of modified plans to determine the appropriate in vivo source tracking error thresholds in each direction. Results: In vivo source tracking error thresholds were directionally dependent; the sm ....

Well Position Error , High Dose Rate , N Vivo , Source Tracking ,

MSNBC Jose Diaz-Balart Reports June 4, 2024 14:15:00

Look inside the school during the massacre. take a look at that you see one, two, three, four officials. two fiel two shields and one, two, three four long weapons, m-4s, m-5s and ars. we ll talk to a source tracking the story. and nbc news, live in moscow, two american veterans captured while fighting for ukraine. you re watching jose diaz-balart reports on msnbc. diaz-balart reports on msnbc. the day you get your clearchoice dental implants makes every day. a let s dig in day. mm. .a chow down day. a take a big bite day. ....

Fiel Two Shields , Nbc News , U S , Live In Moscow , Source Tracking , Xm 4s , M 5s , Jose Diaz Balart Reports , Let S Dig In , Chow Down ,

"HDR prostate brachytherapy plan robustness and its effect on in-vivo s" by Joel Poder, Dylan Koprivec et al.

Purpose: The purpose of this study was to examine the effect of departmental planning techniques on appropriate in-vivo source tracking error thresholds for high dose rate (HDR) prostate brachytherapy (BT) treatments, and to determine if a single in-vivo source tracking error threshold would be appropriate for the same patient anatomy. Methods: The prostate, rectum, and urethra were contoured on a single patient transrectal ultrasound (TRUS) dataset. Anonymized DICOM files were disseminated to 16 departments who created an HDR prostate BT treatment plan on the dataset with a prescription dose of 15 Gy in a single fraction. Departments were asked to follow their own local treatment planning guidelines. Source positioning errors were then simulated in the 16 treatment plans and the effect on dose–volume histogram (DVH) indices calculated. Change in DVH indices were used to determine appropriate in-vivo source tracking error thresholds. Plans were considered to require intervention if t ....

N Vivo , Source Tracking ,