The remarkably distensible stomach: Case report highlighting the implications of gastric filling on radiation treatment planning for gastric lymphoma

Mahmood, Usama; Errens, Martha; Zimrin, Ann B.; Hanna, Nader; Amin, Pradip; Sharma, Navesh K.

doi:10.1016/j.prro.2011.08.006

Cited by 3 publications

(3 citation statements)

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“…Such movements and target deformations can be especially severe for post-prostatectomy radiotherapy, as the bladder is at risk for tumor involvement and is thus included in the target (Fiorino et al, 2005). The location and geometry of other abdominal tumors may similarly be affected by varying stomach and bowel filling, especially if the x-ray CT scan and treatment delivery occur at different times of the day (Mahmood et al, 2012). While no general algorithms are available for estimating the magnitude of such motion and deformation, clinically they are managed by attempts to reproduce a certain organ filling, such as treatment of prostate tumors with rectal balloons filled to a constant volume and by having patients drink water immediately prior to their x-ray CT scan and treatments in order to achieve a full bladder.…”

Section: Non-rigid Body Deformation and Organ Fillingmentioning

confidence: 99%

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Acceptance Testing and Quality Control of Digital Radiographic Imaging Systems

Moyers¹,

Toth²,

Sadagopan³

et al. 2024

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Light ion beam treatments are becoming more widely used. Safe and optimal treatments may only be achieved when uncertainties are considered at every step of the planning and delivery process. These uncertainties include, but are not limited to, penetration uncertainties due to beam delivery, uncertainties in dose compliance, uncertainties of x-ray computed tomography numbers, absolute and relative linear stopping powers, absolute and relative linear scattering powers, conversion of x-ray computed tomography numbers to relative linear stopping power, lateral alignment uncertainties, and uncertainties due to inter-fractional and intra-fractional anatomical variations. Knowing the source and magnitude of these uncertainties, the planner must optimize the plans to mitigate the effect of these uncertainties as much as possible without making the plan undeliverable. Visualization of dose distributions considering the effects of these uncertainties is an important step in evaluating the safety and effectiveness of the plans. This report by Task Group 202 of the AAPM has endeavored to address each of these topics as a guide to the user of light ion beam treatments.

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Section: Non-rigid Body Deformation and Organ Fillingmentioning

confidence: 99%

“…For treatments of abdominal tumors, the patient may be requested to fast before each scan or treatment (Mahmood et al, 2012). Daily use of ultrasound scanners may also be used to verify a given bladder volume (Hynds et al, 2011).…”

Section: Non-rigid Body Deformation and Organ Fillingmentioning

confidence: 99%

Acceptance Testing and Quality Control of Digital Radiographic Imaging Systems

Moyers¹,

Toth²,

Sadagopan³

et al. 2024

View full text Add to dashboard Cite

show abstract

“…252 The pancreas has been shown to move when the stomach is injected with 500 mL to 900 mL of fluid, with the pancreatic tail and SMA having the greatest motion (median motion of 5.3 mm and 5.7 mm, respectively). The stomach is a remarkably distensible adjacent organ and can quadruple in size with oral intake.…”

Section: Intensity-modulated Radiation Therapymentioning

confidence: 99%