Magnetic resonance cystometry: accurate assessment of bladder volume with magnetic resonance imaging

Heverhagen, Johannes T.; Hartlieb, Till; Boehm, Dominik; Klose, Klaus–Jochen; Wagner, Hans‐Joachim

doi:10.1016/s0090-4295(02)01726-0

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…There is no report about the correlation between a large volume of instilled saline solution and corresponding total MR SI in vivo. The only in vivo study approximately similar to ours was the study performed by Heverhagen et al (14). In that study, the authors reported that there was no statistically significant difference between the bladder volume calculated with MR hydrometry and the measured voided bladder volume.…”

Section: Discussionsupporting

confidence: 65%

Calibrated magnetic resonance hydrometry to quantify pancreatic juice: A preliminary study

Jin

Ichikawa

Ertürk

et al. 2008

Magnetic Resonance Imaging

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Purpose:To investigate the effectiveness of the calibrated MR hydrometry (CMRH) method for accurately measuring pancreatic secretion. Materials and Methods:All studies were performed on a 1.5-T MR system using a fat-suppressed, single-shot halfFourier fast spin-echo sequence with a standard body coil. A certain volume (20 mL) of saline solution was employed as an extrabody calibrator. The validity of the CMRH method was tested both in vitro and in vivo, and actual and calculated volumes were compared. Results:The in vitro study yielded a high correlation (r ϭ 0.99; P Ͻ 0.0001) between the actual volume of saline solution in the imaging field and the calculated volume. In the in vivo study, for all volunteers, there was a very strong and significant positive correlation between the measured signal intensities or calculated volumes and actual volumes (correlation coefficient range: 0.94 -0.99; P Ͻ 0.0001).Conclusion: This preliminary study shows that CMRH is an effective tool to measure the amount of pancreatic fluid secretion.

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Section: Discussionsupporting

confidence: 65%

Calibrated magnetic resonance hydrometry to quantify pancreatic juice: A preliminary study

Jin

Ichikawa

Ertürk

et al. 2008

Magnetic Resonance Imaging

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“…A local unpublished study however on 58 patients undergoing consecutive catheterisation, ultrasound scanning and cystometry has cast doubt on catheterisation's place as the gold standard. A recent study [13], found that MRI is an acceptable alternative 'gold standard' for comparison studies, although unlikely to be used for routine clinical work.…”

Section: Introductionmentioning

confidence: 99%

A Quantitative Comparison of Four Current Portable Ultrasound Bladder Scanners

Small

Watson

McConnachie

2008

British Journal of Medical and Surgical Urology

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Portable bladder ultrasound is a necessary investigation in urology and other disciplines. Scanners image with or without bladder wall detection--others provide only numeric readout. In volunteers, we compared measurements from four current scanners. Methods: Bardscan, Verathon BVI3000, Verathon BVI6100 and Sonosite iLook15 were used with 28 healthy volunteers, with scanners in random order. Ordinary least squares regression modelled the measured volumes of each volunteer using each scanner. For each patient-scanner combination, the predicted volume from this model (corrected for the average bias of each scanner) represents the best estimate of the volume, and the difference between the measured bladder volume and the predicted volume was an estimate of the error of that measurement. Results: The iLook15 and Bardscan underpredict, and the BVI3000 and BVI6100 overpredict, relative to the average of the four scanners (p < 0.05). The BVI3000 had slightly greater error variability than the others (p = 0.051). Measurement error appears more variable for larger volumes. Conclusion:The two real-time imaging systems (the SonoSite iLook15 and the Bardscan) tended to give lower volume estimates than the two systems from the same manufacturer (the BVI3000 and BVI6100). Of the two BVI scanners, the 6100 had markedly less variable error.

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“…a larger amniotic fluid sac. Despite similar limitations, when a projection hydrographic method for measuring adult bladder urine volume was compared with true post-micturition urine volume there was no significant difference [14].…”

Section: Discussionmentioning

confidence: 95%

“…Rapid MR hydrographic projection techniques for estimating fluid volume have been described for estimating fluid volumes of the adult stomach [13], bladder [14], and pancreatic secretions [15]. The hydrographic projection technique relies on a single heavily T2w thick-section acquisition, and the majority of body fluids possess a long T2 relaxation time similar to water.…”

Section: Introductionmentioning

confidence: 99%