Publication date: Available online 10 February 2017
Source:Brachytherapy
Author(s): M.F. Jamaluddin, S. Ghosh, M.P. Waine, M. Tavakoli, J. Amanie, A.D. Murtha, D. Yee, N. Usmani
PurposeThe quality of a low–dose rate prostate brachytherapy implant depends on the accurate placement of sources in their planned locations. This study investigates intraoperative factors that potentially contribute to stranded source placement inaccuracy in prostate brachytherapy.Methods and MaterialsIntraoperative video images of the brachytherapist's hand motions and needle insertions during the implant procedure were acquired for analysis. Using video analysis software, maximum and average needle insertion velocities were determined. The number of needle insertion attempts and the use of the brachytherapist's other hand to manipulate the needle direction were also recorded. Sources misplacements were analyzed using an ultrasound-based method described elsewhere.ResultsFifteen patients agreed to undergo this study; 1619 125I seeds were inserted using 357 needles; 1197 seeds were confidently identified using ultrasound images and included in the analysis. The mean overall misplacement was 0.49 cm (0–2 cm, 95% CI = 0.47–0.51); 614 seeds were delivered with a single pass and 583 seeds with >1 passes (range 2–6). The mean maximum needle velocity was 12.34 cm s−1 (range 4–28 cm s−1) and mean average velocity was 4.76 cm s−1 (range 0.4–17.4 cm s−1); 747 seeds were delivered with manipulation of the needle. The generalized linear model test was used to analyze factors contributing to seed misplacement, and it was found that a maximum speed <12 cm s−1 was associated with a decrease in seed misplacement by 0.049 cm vs. a maximum speed >12 cm s−1, p = 0.0121). Other evaluated factors were found to have no statistically significant correlation with seed misplacement: average speed (p = 0.4947), manual manipulation of needle (p = 0.9264), and number of needle passes (p = 0.8907).ConclusionsThis study identified that needles inserted with lower maximum velocity were associated with less seed misplacement. Manual manipulation of the needle, number of passes, and average speed did not show statistically significant correlation with seed misplacement.
from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2kvIJxU
via IFTTT
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
Δημοφιλείς αναρτήσεις
-
A study using a new computer-aided detection (CAD) algorithm found breast cancers... Read more on AuntMinnieEurope.com Related Reading: ...
-
Ahead of print: Prävalenz und Risikofaktoren der felinen Hyperthyreose in einer Klinikpopulation ...Ziel: Die feline Hyperthyreose ist eine häufige Endokrinopathie bei älteren Katzen. In früheren Studien wurden unausgewogene Ernährung, Schi...
-
Dicyclohexyl phthalate (DCHP) is one of the phthalate plasticizers. The objective of the present study was to investigate the effects of DCH...
-
Health Promotion in the Community: Impact of Faith-Based Lay Health Educators in Urban NeighborhoodsAbstract Promoting wellness and providing reliable health information in the community present serious challenges. Lay health educators, al...
-
Abstract To characterize the anatomical connectivity of the prelemniscal radiations (Raprl), a white matter region within the posterior sub...
-
Predictors of postoperative pneumonia in patients undergoing oral cancer resections and its management p. 69 Ridhi Sood, Jerry Paul, Sunil...
-
from Imaging via alkiviadis.1961 on Inoreader http://ift.tt/2Gb1m5b
-
This work presents the nonlinear dynamical analysis of a multilayer piezoelectric macrofiber composite (MFC) laminated shell. The effects of...
-
The upper reaches of the Heihe River have been regarded as a hotspot for phytoecology, climate change, water resources and hydrology studies...
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου