A comparison of bladder volumes based on treatment planning CT and BladderScan® BVI 6100 ultrasound device in a prostate radiation therapy population

Mullaney, L.; O'Shea, E.; Dunne, Mary; Thirion, P.; Armstrong, John G.

doi:10.1259/bjr.20180160

Cited by 13 publications

(16 citation statements)

References 15 publications

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“…The estimated glomerular ltration rate (eGFR) was estimated by the following conversion formula for Japanese men: eGFR (mL/min/1.73 m 2 ) = 194 × serum creatinine (SCr) −1.094 × age − 0.287 (10). For the post-void residual urine volume, the urine volume in the bladder immediately after urination was three-dimensionally measured with an ultrasonic diagnostic apparatus (Bladder Scan BVI 3000 or BVI 6100; Sysmex, Kobe, Japan) (11,12). Patient age was the age at the time of planning CT.…”

Section: Patient Characteristicsmentioning

confidence: 99%

Bladder filling volume variation between the first and second days of planning computed tomography for prostate cancer radiation therapy and correlation with renal function

Ishibashi

Maebayashi

Sakaguchi

et al. 2020

Preprint

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Background During radiation therapy (RT) for prostate cancer, bladder filling helps exclude the organ from irradiation and reduces adverse effects. For RT planning, we performed computed tomography (CT) for 2 consecutive days to evaluate inter-day variations in organs such as the bladder. However, the patient factors that are associated with large intra-patient variations in bladder filling volume prior to RT are not known. Methods This was a retrospective study of 97 prostate cancer patients who underwent CT for 2 consecutive days for RT planning between March 2015 and March 2020 and with confirmed water intake volume before the scans. Patients consumed 500 mL of water immediately after urination and underwent CT 30 min after the start of water intake; CT was performed under similar conditions over 2 consecutive days. Patient information was collected from the medical records taken before CT. Results The median bladder filling volume was 102.8 cm 3 (range: 31.7 to 774.0) and the median intra-patient bladder filling volume variation was 23.4 cm 3 (range: 0.4 to 277.7). Univariate analysis revealed that the intra-patient variation was significantly larger in patients with an eGFR higher than the median ( P =0.003). No other factor showed correlations with the variation. As the larger bladder filling volume of the 2 consecutive days in patients increased (median 121.5 cm 3 , range: 47.8 to 774.0), the intra-patient variation also increased. Conclusions Patients with a higher eGFR show greater variation in bladder filling volume, and caution should be exercised when applying RT in these patients.

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Section: Patient Characteristicsmentioning

confidence: 99%

Bladder filling volume variation between the first and second days of planning computed tomography for prostate cancer radiation therapy and correlation with renal function

Ishibashi

Maebayashi

Sakaguchi

et al. 2020

Preprint

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show abstract

“…Many of the studies included in this review, however, did not specify the exact drinking protocol, which limited definition of the optimal bladder volume/drinking protocol. In a retrospective cohort study of 1080 patients treated with 3D-CRT to the prostate, use of both an empty rectum and comfortably full bladder was associated with reduced biochemical and clinical relapse and risk of dying from prostate cancer [40]. However, some full bladder protocols used for prostate radiotherapy have been shown to result in greater inter-fraction variation in prostate position compared to empty bladder protocols, especially in the superior and anterior directions, and therefore may be less reproducible [41].…”

Section: Bladder Filling Protocolsmentioning

confidence: 99%

“…42 Studies of ultrasound bladder scanning have reported improved consistency of bladder volume during prostate radiotherapy. [43][44][45] This might be because measuring bladder volume encourages better patient compliance with drinking protocols. 43 A cohort study of 190 patients by Mullaney et al found that bladder volume measured by ultrasound was strongly positively correlated with the bladder volume delineated on the radiotherapy planning CT scan.…”

Section: Rectal Spacersmentioning

confidence: 99%

“…43 A cohort study of 190 patients by Mullaney et al found that bladder volume measured by ultrasound was strongly positively correlated with the bladder volume delineated on the radiotherapy planning CT scan. 44 Different bladder-filling strategies may be necessary for whole pelvis treatments compared to the more limited volumes treated during prostate radiotherapy. Eminowicz et al performed a cohort study comparing bladder volume measured at planning and on CBCTs performed during treatment for cervical cancer.…”

Section: Rectal Spacersmentioning

confidence: 99%

“…A further benefit from ultrasound is the potential to reduce radiation dose from additional CBCT scans. 44 Limitations to the use of ultrasound, however, may include imprecision of volume measurements, inter-operator variability in use and additional time needed within the patient pathway to perform the scan (especially if ultrasound was to be used to determine when a fixed bladder volume had been achieved).…”

Section: Rectal Spacersmentioning

confidence: 99%

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Overview of patient preparation strategies to manage internal organ motion during radiotherapy in the pelvis

Slevin

Beasley²,

Speight³

et al. 2019

J Radiother Pract

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Introduction:Pelvic internal organs change in volume and position during radiotherapy. This may compromise the efficacy of treatment or worsen its toxicity. There may be limitations to fully correcting these changes using online image guidance; therefore, effective and consistent patient preparation and positioning remain important. This review aims to provide an overview of the extent of pelvic organ motion and strategies to manage this motion.Methods and Materials:Given the breadth of this topic, a systematic review was not undertaken. Instead, existing systematic reviews and individual high-quality studies addressing strategies to manage pelvic organ motion have been discussed. Suggested levels of evidence and grades of recommendation for each strategy have been applied.Results:Various strategies to manage rectal changes have been investigated including diet and laxatives, enemas and rectal emptying tubes and rectal displacement with endorectal balloons (ERBs) and rectal spacers. Bladder-filling protocols and bladder ultrasound have been used to try to standardise bladder volume. Positioning the patient supine, using a full bladder and positioning prone with or without a belly board, has been examined in an attempt to reduce the volume of irradiated small bowel. Some randomised trials have been performed, with evidence to support the use of ERBs, rectal spacers, bladder-filling protocols and the supine over prone position in prostate radiotherapy. However, there was a lack of consistent high-quality evidence that would be applicable to different disease sites within the pelvis. Many studies included small numbers of patients were non-randomised, used less conformal radiotherapy techniques or did not report clinical outcomes such as toxicity.Conclusions:There is uncertainty as to the clinical benefit of many of the commonly adopted interventions to minimise pelvic organ motion. Given this and the limitations in online image guidance compensation, further investigation of adaptive radiotherapy strategies is required.

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Does a patient-specific bladder-filling protocol affect bladder volume and dose in postprostatectomy radiotherapy?

Yalman,

Köylü,

Duran

2023

Int Urol Nephrol

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A comparison of bladder volumes based on treatment planning CT and BladderScan® BVI 6100 ultrasound device in a prostate radiation therapy population

Abstract: The BladderScan® BVI 6100 provides a convenient and non-irradiating method of indicating BV for use in prostate RT patients.

Cited by 13 publications

References 15 publications

Bladder filling volume variation between the first and second days of planning computed tomography for prostate cancer radiation therapy and correlation with renal function

Bladder filling volume variation between the first and second days of planning computed tomography for prostate cancer radiation therapy and correlation with renal function

Overview of patient preparation strategies to manage internal organ motion during radiotherapy in the pelvis

Does a patient-specific bladder-filling protocol affect bladder volume and dose in postprostatectomy radiotherapy?

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