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Evaluation of Intrafractional Prostate Displacement During Prostate Radiotherapy Using Real-time Ultrasound System by Nur Syazana Mohd Zahir; Marniza Saad; Adlinda Alip; Munira Rejab; Zulaikha Jamalludin; Nur Diyana Afrina Hizam; Yih Miin Liew; Ngie Min Ung is a Medicine article available to read on EtoBox.

What is Evaluation of Intrafractional Prostate Displacement During Prostate Radiotherapy Using Real-time Ultrasound System about?

Transperineal ultrasound (TPUS) is an image-guided radiotherapy system used for tracking intrafraction prostate displacements in real time. The objectives of this study are to evaluate intrafraction prostate displacements and derive planning target volume (PTV) margins for prostate radiotherapy at our institution. The ultrasound (US) data of nine prostate cancer patients referred for VMAT radiotherapy was retrieved. Prior to beam on, patient position was set up with the US probe positioned transperineally with the aid of reference images (fused US and computed tomography images). In each fraction, prostate displacements in three directions [superior/inferior (SI), left/right (LR) and anterior/posterior (AP)] were recorded. PTV margins were determined using Van Herk's formula. To assess the prostate displacement time trend, continuous displacement data were plotted in 30-s intervals for eight minutes. The intrafraction prostate monitoring found a population mean setup error (M p ) of 0.8, 0.1, -1.7 mm, a systematic error of (∑ p ) 0.7, 0.4, 0.9 mm and random error (σ p ) of 0.2, 0.1, 0.3 mm in SI, LR and AP directions, respectively. The PTV margin was found to be the largest in the

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Author

Nur Syazana Mohd Zahir; Marniza Saad; Adlinda Alip; Munira Rejab; Zulaikha Jamalludin; Nur Diyana Afrina Hizam; Yih Miin Liew; Ngie Min Ung

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Medicine (Health Sciences)