Magnetic resonance imaging (MRI) for localization of the prostatic apex: comparison to computed tomography (CT) and urethrography

Milosevic, Michael; Voruganti, S.; Blend, R; Alasti, Hamideh; Warde, Padraig; McLean, Michael; Catton, Pamela; Catton, Charles; Gospodarowicz, Mary K.

doi:10.1016/s0167-8140(97)00232-6

Cited by 117 publications

(50 citation statements)

References 32 publications

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“…Sonourethrography has been used to examine the lower urinary tract, but is not widely applied because of its small field of vision and a lack of recognition among urologists (4). MRI is also used to investigate pathological conditions of the lower urinary tract, but the inspection process is relatively complex (5,15,16), and it is not suitable for use in subjects with a metal implant in the pelvic area.…”

Section: Discussionmentioning

confidence: 99%

“…Conventional radiography, such as retrograde and excretory urethrography, has been used for a century as the standard imaging technique in conventional research on the morphology and function of the lower urinary tract (2,3). Under certain circumstances, other imaging techniques, including ultrasound and magnetic resonance imaging (MRI) may be conducive to the diagnosis of the lower urinary tract diseases (4,5). However, methods including excretory urography, retrograde urography and contrast urography have a number of defects, including the use of an invasive procedure or a lack of quantitative indicators (6,7).…”

Section: Introductionmentioning

confidence: 99%

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640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

Fang

Mao

et al. 2017

Exp Ther Med

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Abstract. The present study aimed to explore the application of 640-slice dynamic volume computed tomography (DVCT) to excretory cystography and urethrography. A total of 70 healthy subjects were included in the study. Excretory cystography and urethrography using 640-slice DVCT was conducted to continuously record the motions of the bladder and the proximal female and male urethra. The patients' voiding process was divided into early, early to middle, middle, middle to late, and late voiding phases. The subjects were analyzed using DVCT and conventional CT. The cross-sectional areas of various sections of the male and female urethra were evaluated, and the average urine flow rate was calculated. The 640-slice DVCT technique was used to dynamically observe the urine flow rate and changes in bladder volume at all voiding phases. The urine volume detected by 640-slice DVCT exhibited no significant difference compared with the actual volume, and no significant difference compared with that determined using conventional CT. Furthermore, no significant difference in the volume of the bladder at each phase of the voiding process was detected between 640-slice DVCT and conventional CT. The results indicate that 640-slice DVCT can accurately evaluate the status of the male posterior urethra and female urethra. In conclusion, 640-slice DVCT is able to multi-dimensionally and dynamically present changes in bladder volume and urine flow rate, and could obtain similar results to conventional CT in detecting urine volume, as well as the status of the male posterior urethra and female urethra.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

Fang

Mao

et al. 2017

Exp Ther Med

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“…There seem to be reasonable choices available to the radiologist when considering volume determinations. Since the reference standard for comparison of PV than does transrectal US or CT ( 12,13,34 ). MR imaging reduces intraobserver inconsistency by a factor of 3.5, at a minimum, compared with CT ( 35 ), while avoiding exposure to ionizing radiation.…”

Section: Genitourinary Imaging: Computer-derived Prostate Volumes Fromentioning

confidence: 99%

Automated Computer-derived Prostate Volumes from MR Imaging Data: Comparison with Radiologist-derived MR Imaging and Pathologic Specimen Volumes

Bulman¹,

Tóth²,

Patel

et al. 2012

Radiology

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Purpose:To compare prostate gland volume (PV) estimation of automated computer-generated multifeature active shape models (MFAs) performed with 3-T magnetic resonance (MR) imaging with that of other methods of PV assessment, with pathologic specimens as the reference standard. Materials and Methods:All subjects provided written informed consent for this HIPAA-compliant and institutional review board-approved study. Freshly weighed prostatectomy specimens from 91 patients (mean age, 59 years; range, 42-84 years) served as the reference standard. PVs were manually calculated by two independent readers from MR images by using the standard ellipsoid formula. Planimetry PV was calculated from gland areas generated by two independent investigators by using manually drawn regions of interest.Computer-automated assessment of PV with an MFA was determined by the aggregate computer-calculated prostate area over the range of axial T2-weighted prostate MR images. Linear regression, linear mixed-effects models, concordance correlation coeffi cients, and Bland-Altman limits of agreement were used to compare volume estimation methods. Results:MFA-derived PVs had the best correlation with pathologic specimen PVs (slope, 0.888). Planimetry derived volumes produced slopes of 0.864 and 0.804 for two independent readers when compared with specimen PVs. Ellipsoid formula-derived PVs had slopes closest to one when compared with planimetry PVs. Manual MR imaging and MFA PV estimates had high concordance correlation coefficients with pathologic specimens. Conclusion:MFAs with axial T2-weighted MR imaging provided an automated and effi cient tool with which to assess PV. Both MFAs and MR imaging planimetry require adjustments for optimized PV accuracy when compared with prostatectomy specimens.q RSNA, 2012

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“…New developments including fusing MRI with other imaging modalities may help direct radiotherapy planning. [33][34][35][36] More accurate targeting may decrease morbidity by reducing dose to erectile tissue and rectum. 37,38 MRI can also be helpful in the post-treatment follow-up of …”

Section: Staging Accuracy and Indicationsmentioning

confidence: 99%

Magnetic resonance imaging in prostate cancer

Heenan

2004

Prostate Cancer Prostatic Dis

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With the recently published National Institute of Clinical Excellence guidelines, it is now generally accepted that magnetic resonance imaging (MRI) is the imaging method of choice for staging prostate cancer in patients for whom radical treatment is being considered. MRI offers the single most accurate assessment of local disease and regional metastatic spread. As well as detecting extraprostatic extension, this technique can locate the site of intraprostatic disease, which may prove useful in planning disease-targeting therapies currently being developed. However, numerous studies have reported widely varying accuracies indicating that MRI is not the perfect imaging modality; microscopic and early macroscopic invasion cannot be reliably shown using current technology. The role of MRI including advantages, limitations and future developments will be discussed.

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Magnetic resonance imaging (MRI) for localization of the prostatic apex: comparison to computed tomography (CT) and urethrography

Cited by 117 publications

References 32 publications

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

640-slice DVCT multi-dimensionally and dynamically presents changes in bladder volume and urine flow rate

Automated Computer-derived Prostate Volumes from MR Imaging Data: Comparison with Radiologist-derived MR Imaging and Pathologic Specimen Volumes

Magnetic resonance imaging in prostate cancer

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