Diffusion-weighted MR imaging findings of kidneys in patients with early phase of obstruction

Bozgeyik, Zülkif; Kocakoç, Ercan; Sönmezgöz, Fitnet

doi:10.1016/j.ejrad.2008.01.013

Cited by 25 publications

(12 citation statements)

References 20 publications

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“…Furthermore, Namimoto et al [29] demonstrated a linear correlation between the ADC values of cortex and medulla and that of serum creatinine and GFR [29]. These studies highlight the potential role of renal ADC values in the evaluation of renal dysfunction in native kidneys [18,21,[28][29][30].…”

Section: Chronic Renal Failurementioning

confidence: 92%

“…This is probably due to changes in both increased renal fibrosis and decreased capillary perfusion. Bozgeyik et al [21] demonstrated that an obstructed nonfunctioning kidney has a lower ADC compared to the contralateral normal functioning kidney. Furthermore, Namimoto et al [29] demonstrated a linear correlation between the ADC values of cortex and medulla and that of serum creatinine and GFR [29].…”

Section: Chronic Renal Failurementioning

confidence: 98%

“…Multiple studies have explored the role of DWI in liver lesion detection/characterization, assessment of chronic liver disease, and evaluation of renal masses [12,13,17,19]. A handful of studies also have explored the potential of DWI in the evaluation of renal function [9,14,15,18,[20][21][22][23][24][25][26][27].…”

Section: Diffusion-weighted Mrimentioning

confidence: 99%

“…The sequences most commonly used in DWI of the abdominal organs are based on single-shot echo-planar imaging (SS EPI) [9,14,15,17,21]. SS EPI can be performed in a breath hold, or can be respiratory-triggered or respiratory-navigated, with acquisition times ranging between 15 and 180 s. In DWI, the b value, or diffusion factor, relates to the magnitude and duration of the applied diffusion gradients and can be varied by the operator; the higher the b value, the more the diffusion weighting.…”

Section: Techniquementioning

confidence: 99%

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Noncontrast Functional MRI of the Kidneys

et al. 2011

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Functional magnetic resonance imaging (fMRI) techniques enable noninvasive assessment of renal function. Diffusion-weighted imaging, diffusion tensor imaging, blood oxygen level-dependent MRI, magnetic resonance elastography, and arterial spin labeling are some of the emerging techniques that have potential to investigate renal function without the use of exogenous gadolinium contrast. This article discusses the principles of these techniques, as well as their possible applications and limitations. This will introduce the readers to these novel imaging tools, which appear to have promising futures.

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Section: Chronic Renal Failurementioning

confidence: 92%

Section: Chronic Renal Failurementioning

confidence: 98%

Section: Diffusion-weighted Mrimentioning

confidence: 99%

Section: Techniquementioning

confidence: 99%

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Noncontrast Functional MRI of the Kidneys

et al. 2011

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“…Urolithiasis is one of the most common urological diseases, and extracorporeal shock wave lithotripsy (SWL) is the method of choice in majority of cases [1,2]. Although it rarely leads to serious complications, SWL treatment is generally accepted as safe and has negligible side effects on long-term follow-up.…”

Section: Introductionmentioning

confidence: 99%

The Daily Resistive Index measurement useful tool in the estimation of the optimal time interval between two Shock Wave Lithotripsy sessions.

et al. 2015

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Objective: To monitor the impact of Shock Wave Lithotripsy (SWL) on the renal resisive index (RI) and to investigate the potential of the RI measurement for the estimation of the optimal duration between 2 SWL sessions. Material and methods: Thirty patients with single pelvis renalis stone were included. Participitants were grouped according to their age as group1 (<40 years, mean age 36.2±3.9 years) and group 2 (≥40 years, mean age 55.4±6.5 years). RI measurement was performed in of all patients prior to SWL. After SWL, RI was monitored daily until RI returned to their pre-SWL values. Results: The mean stone size was 2 8.97±3.62 in group 1 and 10.08±4.67 mm in group 2 (p=0.077). Following SWL RI value of both goups increased and higher RI value was measured at 24 th hour as compared with their pre-SWL values (p<0.001). In day 2 RI of the groups declined, but the differences were still statistically different from their pre-SWL RI values (p<0.001). However, on the third day, RI of group 1 was close to their pre-SWL level (p=0.143). But, in group 2, RI value returned to their pre-SWL limits on day 4 (p=0.229). Conclusions: RI measurement gives important data regarding SWL related acute renal trauma and should be used as an US marker for recovery after SWL.

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