Validation of an external ultrasound device for bladder volume measurements in prostate conformal radiotherapy

O'Shea, E.; Armstrong, John G.; O'Hara, Tom; O’Neill, Linda; Thirion, P.

doi:10.1016/j.radi.2007.06.001

Cited by 15 publications

(25 citation statements)

References 18 publications

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“…However, our study did not use a scale to measure the patient's sensation of bladder filling so it is not sensitive to different states of bladder filling. Other studies 7,9 that have used a scale to measure sensation of bladder filling have found a loose correlation, which may be more accurate than our measurement. This information may be useful in practice for staff to ask patients if they feel their bladder is comfortably full.…”

Section: Discussioncontrasting

confidence: 44%

“…Other studies using similar devices by the same manufacturer have also displayed similar correlations. 5,8,9 The BladderScan® appears to have overestimated the bladder volume by greater than 30% when compared to the CT vol in four participants. One case, which gave the greatest overestimation, is possibly due to the patient having an extensive, recent midline scar after prostatectomy.…”

Section: Discussionmentioning

confidence: 82%

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Measured bladder volume for radiotherapy of the prostate using the hand‐held BladderScan® BVI 3000

Gawthrop

Oates

2012

Radiographer

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Purpose: It is known that the volume of the bladder can influence the position of the prostate or prostatic bed and the amount of small bowel in external beam radiotherapy treatment for prostate cancer. Therefore reducing the variation of the bladder volume between planning and treatment, should improve the accuracy of treatment. Patients at our radiotherapy centre are instructed to have a comfortably full bladder for treatment. A hand‐held BladderScan® (Diagnostic Ultrasound Europe B.V, IJsselstein, Netherlands) three‐dimensional (3D) ultrasound device was tested for correlation between volumes measured using the BladderScan® and volumes contoured using computed tomography (CT) data. The device was used to assess if patients can judge the comfortably full state of their bladder. In addition it was investigated whether the residual volume of the bladder changed over the course of radiotherapy. Methods: For 11 radical prostate patients measurements of bladder volume using the BladderScan® were taken at CT planning and at each treatment of the full bladder volume prior to the procedure and then with an empty bladder post procedure. Results: We found that there is a good correlation (r = 0.85) between the measured bladder volume and a contoured volume, validating the use of the BladderScan®. Patients could judge the comfortably full state of their bladder at 76.5% of fractions. Over the course of radiotherapy there was equal distribution of positive and negative trends of residual bladder volumes. Conclusion: We conclude that the BladderScan® is a reliable device for assessing bladder volume, and patients can correctly judge their comfortably full bladder in most cases.

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Section: Discussioncontrasting

confidence: 44%

Section: Discussionmentioning

confidence: 82%

Measured bladder volume for radiotherapy of the prostate using the hand‐held BladderScan® BVI 3000

Gawthrop

Oates

2012

Radiographer

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“…In prostate radiotherapy, O'Shea et al compared bladder volumes delineated on planning CT scan with the volume readings obtained from BS and found no significant differences (P = 0.35). 10 Similarly, in patients with cervical cancer receiving radiotherapy, bladder volumes obtained with BS at the time of planning CT scan showed strong correlation with those measured from the CT scan. 3 McBain et al measured post-void BS volumes prior to bladder cancer radiotherapy in 20 patients and detected 6 patients with significant changes to the bladder volumes over the treatment course.…”

Section: Discussionmentioning

confidence: 99%

“…To improve interfraction bladder volume consistency, the portable three‐dimensional bladder scanner (BS) has previously been studied in radiotherapy to pelvic tumour sites, where consistent bladder volume is important. In prostate and cervical cancer radiotherapy, the bladder volume readings from the BS have been compared with those obtained from planning CT scan, and the two imaging modalities have shown a strong correlation . The BS has also been found to provide a practical daily verification tool allowing detection of patients who may require interventions to promote bladder volume reproducibility in bladder cancer radiotherapy …”

Section: Introductionmentioning

confidence: 99%

“…In prostate and cervical cancer radiotherapy, the bladder volume readings from the BS have been compared with those obtained from planning CT scan, and the two imaging modalities have shown a strong correlation. 3,9,10 The BS has also been found to provide a practical daily verification tool allowing detection of patients who may require interventions to promote bladder volume reproducibility in bladder cancer radiotherapy. 11 With the advent of image-guided radiotherapy utilising cone-beam CT (CBCT), practice protocols incorporating CBCT in post-prostatectomy radiotherapy are being developed.…”

Section: Introductionmentioning

confidence: 99%

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Comparison study of portable bladder scanner versus cone‐beam CT scan for measuring bladder volumes in post‐prostatectomy patients undergoing radiotherapy

et al. 2014

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Use of a prospective cohort study in the development of a bladder scanning protocol to assist in bladder filling consistency for prostate cancer patients receiving radiation therapy

Cramp

Connors

Wood

et al. 2016

J of Medical Radiation Sci

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IntroductionEvidence of variations in bladder filling effecting prostate stability and therefore treatment and side‐effects is well established with intensity modulated radiation therapy (IMRT). This study aimed to increase bladder volume reproducibility for prostate radiation therapy by implementing a bladder scanning (BS) protocol that could assist patients' bladder filling at computed tomography (CT) simulation and treatment.MethodsBased on a retrospective review of 524 prostate cancer patients, a bladder volume of 250–350 mL was adopted as ‘ideal’ for achieving planning dose constraints. A prospective cohort study was conducted to assess the clinical utility of measuring patients' bladder volumes at CT simulation using an ultrasound bladder scanner (Verathon 9400 BladderScan®). A revised bladder preparation protocol was utilised by a bladder scan group (BS) and a non‐BS group followed the standard departmental bladder preparation protocol. Time and volume data for the BS group (n = 17) were compared with the non‐BS group (n = 17).ResultsThe BS cohort had a CT bladder volume range of 221–588 mL; mean 379 mL, SD 125 mL. The non‐BS group had a larger range: 184–757 mL; mean 373 mL, SD 160 mL (P = 0.9171). There was a positive correlation between CT volume and BS volume in the BS group (r = 0.797; P = 0.0002) although BS volumes were smaller: range 160–420 mL; mean 251 mL; SD 91 mL; P < 0.0001). The maximum bladder volume receiving 50 Gy (V50) from the BS group was 46.4%, mean 24.5%. The maximum bladder V50 from the non‐BS group was 50.9%, mean 27.3% (P = 0.5178). Treatment data from weekly cone beam CT scans were also compared over 6 weeks. They were assessed as being a pass if bladder and bowel requirements were acceptable. The BS group proceeded to treatment on the basis of a pass 92.7% of the time, whereas the pass rate for non‐BS group was 75%; difference 17.7% (P < 0.0001).ConclusionThe BS is a useful tool for achieving consistent, appropriately sized bladder volumes in prostate cancer patients.

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Validation of an external ultrasound device for bladder volume measurements in prostate conformal radiotherapy

Cited by 15 publications

References 18 publications

Measured bladder volume for radiotherapy of the prostate using the hand‐held BladderScan® BVI 3000

Measured bladder volume for radiotherapy of the prostate using the hand‐held BladderScan® BVI 3000

Comparison study of portable bladder scanner versus cone‐beam CT scan for measuring bladder volumes in post‐prostatectomy patients undergoing radiotherapy

Use of a prospective cohort study in the development of a bladder scanning protocol to assist in bladder filling consistency for prostate cancer patients receiving radiation therapy

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