Serial renal sonographic changes in preeclampsia.

Schütz, Kathrin; Siffring, P A; Forrest, T S; Hill, W. C. Osman; Frick, Mathis P.

doi:10.7863/jum.1990.9.7.415

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…Chronic renal diseases result in bilateral small kidneys whereas the kidneys may be bilaterally enlarged in early diabetic renal disease, acute interstitial nephritis, HIV nephropathy, and amyloidosis (56- 60). A unilateral small kidney is obvious but a symmetrical bilateral increase or decrease in renal size is not likely to be recognized on a 99m Tc-MAG3 scan.…”

Section: Introductionmentioning

confidence: 99%

Computer-Assisted Diagnosis in Renal Nuclear Medicine: Rationale, Methodology, and Interpretative Criteria for Diuretic Renography

Taylor

Garcia

2014

Seminars in Nuclear Medicine

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The goal of artificial intelligence, expert systems, decision support systems and computer assisted diagnosis (CAD) in imaging is the development and implementation of software to assist in the detection and evaluation of abnormalities, to alert physicians to cognitive biases, to reduce intra and inter-observer variability and to facilitate the interpretation of studies at a faster rate and with a higher level of accuracy. These developments are needed to meet the challenges resulting from a rapid increase in the volume of diagnostic imaging studies coupled with a concurrent increase in the number and complexity of images in each patient data. The convergence of an expanding knowledge base and escalating time constraints increases the likelihood of physician errors. Errors are even more likely when physicians interpret low volume studies such as 99mTc-MAG3 diuretic scans where imagers may have had limited training or experience. Decision support systems include neural networks, case-based reasoning, expert systems and statistical systems. iRENEX (renal expert) is an expert system for diuretic renography that uses a set of rules obtained from human experts to analyze a knowledge base of both clinical parameters and quantitative parameters derived from the renogram. Initial studies have shown that the interpretations provided by iRENEX are comparable to the interpretations of a panel of experts. iRENEX provides immediate patient specific feedback at the time of scan interpretation, can be queried to provide the reasons for its conclusions and can be used as an educational tool to teach trainees to better interpret renal scans. iRENEX also has the capacity to populate a structured reporting module and generate a clear and concise impression based on the elements contained in the report; adherence to the procedural and data entry components of the structured reporting module assures and documents procedural competency. Finally, although the focus is CAD applied to diuretic renography, this review offers a window into the rationale, methodology and broader applications of computer assisted diagnosis in medical imaging.

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Section: Introductionmentioning

confidence: 99%

Computer-Assisted Diagnosis in Renal Nuclear Medicine: Rationale, Methodology, and Interpretative Criteria for Diuretic Renography

Taylor

Garcia

2014

Seminars in Nuclear Medicine

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“…A number of chronic renal diseases will result in bilateral small kidneys, whereas the kidneys may be bilaterally enlarged in early diabetic renal disease, acute interstitial nephritis, HIV nephropathy, amyloidosis, and preeclampsia. 1–5 A unilateral small kidney is obvious, but a small kidney may not be obvious on a MAG3 renal scan when the contralateral kidney is similarly reduced in size; similarly, an abnormal increase in renal size may not be recognized if both kidneys are similarly enlarged and have a normal configuration. Correlative imaging studies may provide size information, but correlative imaging studies may not be available.…”

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confidence: 99%

Reference Values for Renal Size Obtained From MAG3 Scintigraphy

Taylor

Shenvi²,

Folks³

et al. 2013

Clinical Nuclear Medicine

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Purpose The purposes of this study were to establish reference values for renal size determined from 99mTc-MAG3 renal scintigraphy and to derive regression equations to predict normal limits. Methods The study population consisted of 106 subjects evaluated for kidney donation who underwent 99mTc-MAG3 renal scintigraphy. Renal length, width, and area were determined from the pixel length and area of whole-kidney regions of interest and correlated with patient sex, height, weight, body mass index, and body surface area (BSA). Reference values were obtained based on estimation of the lower and upper percentiles via quantile regression. Results The mean (SD) left and right kidney lengths was 12.2 (1.0) and 12.1 (1.0) in male and 11.9 (0.9) and 11.8 (0.9) in female patients, respectively. Sex was not a significant factor in the quantile regression models. Regression equations defining the lower and upper limits of renal length (cm) and area (cm2) are as follows: left kidney length (5th percentile), 8.2 + 1.3 × BSA; left kidney length (95th percentile), 9.1 + 2.3 × BSA; right kidney length (5th percentile), 8.8 + 1.0 × BSA; right kidney length (95th percentile), 11.1 + 1.4 × BSA; left kidney area (5th percentile), 32.5 + 9.6 × BSA; left kidney area (95th percentile), 12.6 + 31.7 × BSA; right kidney area (5th percentile), 16.1 + 18.5 × BSA; right kidney area (95th percentile), 32.6 + 22.2 × BSA. Conclusions Regression equations have been developed, which define the upper and lower limits of renal size from 99mTc-MAG3 images and may assist in the detection of unsuspected bilateral increases or decreases in renal size.

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Point-of-care ultrasound in the critically ill pregnant or postpartum patient: what every intensivist should know

Blanco¹,

Abdo-Cuza²

2019

Intensive Care Med

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Serial renal sonographic changes in preeclampsia.

Cited by 6 publications

References 2 publications

Computer-Assisted Diagnosis in Renal Nuclear Medicine: Rationale, Methodology, and Interpretative Criteria for Diuretic Renography

Computer-Assisted Diagnosis in Renal Nuclear Medicine: Rationale, Methodology, and Interpretative Criteria for Diuretic Renography

Reference Values for Renal Size Obtained From MAG3 Scintigraphy

Point-of-care ultrasound in the critically ill pregnant or postpartum patient: what every intensivist should know

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