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MRI evaluate the preoperative renal function

Shigeru Suzuki, Toshiaki Kotani, Kazuetsu Mori, Ken Kawamura, Akira Ohtake
BACKGROUND: While the association between scoliosis and impairments in cardiac and respiratory function has been well characterized in clinical practice and research, the potential effect of scoliosis on urinary tract structure and renal function has received little attention. Therefore, the purpose of our study was to evaluate the preoperative clinical characteristics of urinary tract structure and renal function in pediatric patients with idiopathic scoliosis, using a combination of blood tests, urinalyses, and imaging procedures...
August 10, 2016: Pediatrics International: Official Journal of the Japan Pediatric Society
Abhishek Chaturvedi, Susan K Hobbs, Fred S Ling, Apeksha Chaturvedi, Peter Knight
Transcatheter Aortic Valve Implantation (TAVI) is increasingly being used in patients with severe aortic stenosis who are not candidates for surgery. ECG-gated CT angiography (CTA) plays an important role in the preoperative planning for these devices. As the number of patients undergoing these procedures increases, a subset of patients is being recognized who have contraindications to iodinated contrast medium, either due to a prior severe allergic type reaction or poor renal function. Another subgroup of patients with low flow and low gradient aortic stenosis is being recognized that are usually assessed for severity of aortic stenosis by stress echocardiography...
April 2016: Insights Into Imaging
Cécile O Muller, Thomas Blanc, Matthieu Peycelon, Alaa El Ghoneimi
OBJECTIVE: Ectopic kidney is a rare urologic condition and may be revealed by ureteropelvic junction obstruction (UPJO) in children, with pelvic kidney being the most common location. Our experience using a minimally invasive approach to treat UPJO by dismembered pyeloplasty led us to report five cases of UPJO with pelvic kidney operated on by transperitoneal laparoscopy, focusing on medium-term follow-up results and surgical technique. PATIENTS AND METHODS: From 1999 to 2010, we reviewed all cases of UPJO managed in our center, a total of 391 patients...
December 2015: Journal of Pediatric Urology
D Geisel, L Lüdemann, B Hamm, T Denecke
UNLABELLED: Preoperative assessment of liver function and prediction of postoperative functional reserve are important in patients scheduled for liver resection. While determination of absolute liver function currently mostly relies on laboratory tests and clinical scores, postoperative remnant liver function is estimated volumetrically using imaging data obtained with computed tomography (CT) or magnetic resonance imaging (MRI). Accurate estimation of hepatic function is also relevant for intensive care patients, oncologic patients, and patients with diffuse liver disease...
October 2015: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
Myeong-Jin Kim
Recently, Gadoxetic acid (Gd-EOB-DTPA; Primovist®; Bayer Schering Pharma), a tissue-specific contrast material, has been used for clinical MR imaging. This agent is a biphasic hepatobiliary contrast agent because it behaves as both an extracellular and a hepatocyte-specifi c agent as it undergoes both renal and biliary excretion. Up to 50% of the injected dose is taken up into normal hepatocytes due to the presence of the lipophilic ethoxybenzyl group in its chemical structure. As such, dynamic imaging can be performed using this agent for the evaluation of hemodynamic perfusion or status and for hepatobiliary phase imaging (10 to 20 minutes after injection) for the evaluation of functional status...
March 2011: Gut and Liver
F Schoth, T Persigehl, M Palmowski
During the past years, magnetic resonance imaging (MRI) has been established as a reliable method for examination of the kidneys. Modern MRI systems enable to visualize renal masses with a high spatial resolution. This enables not only to differentiate between benign lesions and renal cancer but also to define the tumor stage with high accuracy. The impact of a precise preoperative staging has increased significantly due to stage adapted therapy approaches such as nephron sparing surgery or local ablative techniques (e...
December 2010: Panminerva Medica
Javier Fermin Barba Abad, Luis Romero Vargas, Egoitz Tolosa Eizaguirre, Anibal Rincón Mayans, David Rosell Costa, Jose Enrique Robles García, Ignacio Pascual Piedrola
OBJECTIVE: Renal malformations are rare entities and rarely have clinical consequences. Crossed renal ectopia has an incidence of 1/2.000 autopsies. The association with aortic aneurysm is even more exceptional. METHODS: We present our case and perform a bibliographic review. RESULTS: To date and in our knowledge, seven cases of crossed renal ectopia associated with aortic aneurysm were described on the literature. This malformation makes the treatment of the aneurysm more complex...
November 2010: Archivos Españoles de Urología
Cristina Rossi, Andreas Boss, Ferruh Artunc, Serdar Yildiz, Petros Martirosian, Helmut Dittmann, Claus D Claussen, Nils Heyne, Fritz Schick, Heinz-Peter Schlemmer
OBJECTIVES: To test the feasibility of a single MR-based examination allowing for the comprehensive assessment of renal anatomy, function, and vascular status in candidates for kidney transplantation. MATERIALS AND METHODS: Twelve healthy potential kidney donors (mean age: 47 +/- 14 [standard deviation] years, 3 men and 9 women) participated in the study, which was approved by the local ethics committee. MR-nephrography was performed using a navigator-gated T1-weighted saturation-recovery sequence (TrueFISP: TR/TE = 621...
November 2009: Investigative Radiology
Amy E Krambeck, Michael A Farrell, Matthew R Callstrom, Thomas D Atwell, J William Charboneau, George K Chow, David S Dimarco, David E Patterson
OBJECTIVES: Radiofrequency ablation (RFA) is a minimally invasive therapy aimed at maximal preservation of renal function in the nonsurgical renal mass patient. We evaluate our experience with RFA of renal tumors in the solitary kidney. PATIENTS AND METHODS: A retrospective review of all patients with a solitary kidney treated with RFA for renal mass was performed. Two radiologists reviewed all images. From December 2001 to June 2006, 55 renal tumors were treated with RFA in 30 patients with a solitary kidney...
August 2008: Canadian Journal of Urology
János Fazakas, Tamás Mándli, Gábor Ther, Balázs Füle, Szabolcs Tóth, Judit Fazakas, Endre Németh, Márta Hidvégi, Mónika Arkosy
The living related donor mortality after liver donation could occur as a result of postoperative cardiovascular and thromboembolic complication; which could be minimized by detailed preoperative assessment of the living donor. The preoperative functional tests evaluate the physiological reserve or identify the living donors with limited response to the surgical stress. Based on the results of CT volumetry, MRI and liver functional reserve capacity test (indocyanine green retention ratio) the liver resection can be done safely...
December 2, 2007: Orvosi Hetilap
Thomas C Lauenstein, Khalil Salman, Roger Morreira, Thomas Heffron, James R Spivey, Enrique Martinez, Puneet Sharma, Diego R Martin
OBJECTIVE: The purpose of this study was to evaluate prospectively acquired institutional results to determine the accuracy of gadolinium-enhanced MRI in liver tumor surveillance before transplantation. SUBJECTS AND METHODS: One hundred fifteen patients underwent MRI of the abdomen within 90 days before liver transplantation. Images were acquired with gadolinium-enhanced 3D gradient-echo sequences in the arterial, venous, and delayed phases. Detection of hepatocellular carcinoma (HCC) was based on the imaging criteria arterial phase enhancement, delayed phase hypointensity, and development of an enhancing outer margin capsule...
September 2007: AJR. American Journal of Roentgenology
J J Nikken, G P Krestin
Ultrasound and computed tomography (CT) are modalities of first choice in renal imaging. Until now, magnetic resonance imaging (MRI) has mainly been used as a problem-solving technique. MRI has the advantage of superior soft-tissue contrast, which provides a powerful tool in the detection and characterization of renal lesions. The MRI features of common and less common renal lesions are discussed as well as the evaluation of the spread of malignant lesions and preoperative assessment. MR urography technique and applications are discussed as well as the role of MRI in the evaluation of potential kidney donors...
November 2007: European Radiology
François Marcelli, Pierre Collinet, Denis Vinatier, Yann Robert, Jean-Pierre Triboulet, Jacques Biserte, Arnauld Villers
OBJECTIVES: To evaluate the clinical features, staging by medical imaging, treatment strategy and results of surgical management of deep pelvic endometriosis with bladder and/or ureteric involvement. MATERIALS AND METHODS: Eighteen cases of ureteric and/or bladder deep pelvic endometriosis (DPE) were treated in our centre between 1996 and 2004. Preoperative data (clinical symptoms, MR imaging), intraoperative data (resection and urinary tract diversion procedures, associated procedures on the genital and gastrointestinal tracts), and postoperative data (histological results, complications, anatomical follow-up by imaging and functional assessment) were reviewed...
November 2006: Progrès en Urologie
C-T Wu, Y-J Chiang, K-L Liu, S-H Chu
BACKGROUND: Modern imaging, such as CT and MRI, improves the preoperative assessment for variants of renal vasculature. We present a kidney donor with a duplex inferior vena cava. In conjunction with CT and hand-assisted laparoscopic surgery, live donor nephrectomy was performed successfully. METHODS: A 35-year-old woman wished to donate a kidney to her son. Preoperative CT showed normal functional kidneys without uretal duplication. A duplex inferior vena cava was noted below the level of the left renal vein...
September 2004: Transplantation Proceedings
Mitsutaka Edanaga, Shin-ichiro Yoshida, Masayasu Nakayama, Noriaki Kanaya, Akiyoshi Namiki
A 55-year-old man was admitted to our hospital for treatment of renal cell carcinoma. Preoperative MRI showed infradiaphragmatic extension of the tumor thrombus. However, intraoperative transesophageal echocardiography (TEE) revealed intracardiac extension of the thrombus. Therefore, the tumor thrombus was extirpated under cardiopulmonary bypass. The patient recovered without any complications. Intraoperative TEE monitoring is useful not only for the evaluation of cardiac functions but also for intraoperative diagnosis of a tumor thrombus during the operation for renal cell carcinoma...
July 2004: Masui. the Japanese Journal of Anesthesiology
W B Shingleton, P E Sewell
OBJECTIVE: To investigate the use of cryoablation for small renal tumours (</= 5 cm) in patients with solitary kidneys, as the advantage of this technique might be to preserve nephrons for maintaining renal function with minimal morbidity. PATIENTS AND METHODS: Patients with a radiographically documented solid renal mass in a solitary kidney were evaluated for treatment with percutaneous cryoablation. Under general anaesthesia the patients were placed in an interventional magnetic resonance imaging (MRI) unit...
August 2003: BJU International
C Roy, C Tuchmann, M Morel, C Saussine, D Jacqmin, J Tongio
In recent years, the development of noninvasive imaging modalities for exploration of the kidney has markedly reduced the use of angiography in the evaluation of renal masses. Presently, it is not required in routine practice to evaluate renal masses. Ultrasound is the most efficient procedure in detecting renal tumor. It is acknowledged that arteriography has a limited diagnostic and staging value compared with CT and MRI for the assessment of renal cell carcinomas (RCC). Most urologists recommend partial nephrectomy or tumor enucleation in an effort to preserve as much as possible functioning renal tissue...
1999: European Radiology
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