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CT urography

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https://www.readbyqxmd.com/read/29118532/transperitoneal-laparoscopic-repair-of-retrocaval-ureter-our-experience-and-review-of-literature
#1
Ashwin S Tamhankar, Abhishek J Savalia, Ajit S Sawant, Prakash W Pawar, Gaurav V Kasat, Sunil R Patil
Context and Aim: Retrocaval ureter (RCU), also known as circumcaval ureter, occurs due to anomalous development of inferior vena cava (IVC) and not ureter. The surgical approach for this entity has shifted from open to laparoscopic and robotic surgery. This is a relatively new line of management with very few case reports. Herein, we describe the etiopathology, our experience with six cases of transperitoneal laparoscopic repair of RCU operated at tertiary care center in India and have reviewed different management options...
October 2017: Urology Annals
https://www.readbyqxmd.com/read/29102424/lower-tract-neoplasm-update-of-imaging-evaluation
#2
REVIEW
Robert Hartman, Akira Kawashima
Cancers of the lower urinary tract can arise from the bladder, urachus or urethra. Urothelial carcinoma of the bladder (UCB) is the most common of these. The presentation of bladder, urachal and urethral cancers can differ but many result in hematuria as an initial indication. The diagnosis and staging of these cancers often necessitate radiologic imaging often in the form of cross-section CT urography or MR urography. The following article reviews the specific nature of lower tract cancers and their imaging...
November 1, 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28992845/-correct-diagnostic-of-traumatic-renal-trauma-is-important-for-the-treatment
#3
EDITORIAL
Sophia Liff Maibom, Susanne Christiansen Frevert, Mette Lind Holm
Renal trauma is injury to the kidney because of either blunt or penetrating trauma. The condition must be diagnosed quickly and correctly in order to preserve kidney function. This article describes classification, diagnostics, treatment and follow-up. It is important to do a CT-urography to classify the injury properly. The majority of the patients with renal injury can be managed conservatively. Surgical exploration is primarily for the control of haemorrhage. Complications may require additional imaging or inter-ventions...
October 2, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28971295/determination-of-single-kidney-glomerular-filtration-rate-gfr-with-ct-urography-versus-renal-dynamic-imaging-gates-method
#4
Shan You, XianWu Ma, ChangZhu Zhang, Qiang Li, WenWei Shi, Jing Zhang, XiaoDong Yuan
OBJECTIVES: To present a single-kidney CT-GFR measurement and compare it with the renal dynamic imaging Gates-GFR. MATERIALS AND METHODS: Thirty-six patients with hydronephrosis referred for CT urography and 99mTc-DTPA renal dynamic imaging were prospectively included. Informed consent was obtained from all patients. The CT urography protocol included non-contrast, nephrographic, and excretory phase imaging. The total CT-GFR was calculated by dividing the CT number increments of the total urinary system between the nephrographic and excretory phase by the products of iodine concentration in the aorta and the elapsed time, then multiplied by (1- Haematocrit)...
October 2, 2017: European Radiology
https://www.readbyqxmd.com/read/28900827/lifetime-radiation-exposure-in-patients-with-recurrent-nephrolithiasis
#5
REVIEW
Mohamed A Elkoushy, Sero Andonian
Patients presenting with nephrolithiasis often undergo repeated imaging studies before, during, and after management. Considering the significant risk of stone recurrence in primary stone-formers, repeated imaging studies are not uncommon. Cumulative effects of ionizing radiation exposure from various imaging studies could potentially increase the risk for developing cataracts and solid malignancies in urolithiasis patients. Therefore, practitioners planning or performing imaging studies with ionizing radiation are compelled to keep radiation exposure to humans and the environment as low as possible, thus strictly adhering to the ALARA (As Low as Reasonably Achievable) principles...
September 12, 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28845492/twinkle-twinkle-little-stone-an-artifact-improves-the-ultrasound-performance
#6
Mirela Liana Gliga, Cristian Nicolae Chirila, Daniela Maria Podeanu, Torok Imola, Sanda Lucia Voicu, Mihail Gheorghe Gliga, Paula Maria Gliga
AIMS: Ultrasound is a noninvasive method used for the diagnosis of urinary lithiasis. When the length of the stone is less than 5 mm, its detection may be difficult. The twinkling artifact (TwA) is an intense alternating color signal behind calcifications and stones in different organs. The aim of this paper was to evaluate the importance of the TwA in detecting kidney stones less than 5 mm in length. MATERIAL AND METHODS: We examined 230 patients with lumbar pain or a history of kidney stones...
June 17, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28830196/prediction-of-high-grade-ureteral-urothelial-carcinoma-on-ct-urography
#7
Hwang Sung Tae, Sung Deuk Jae, Yang Kyung Sook, Sim Ki Choon, Han Na Yeon, Park Beom Jin, Kim Min Ju, Cho Sung Bum
OBJECTIVE: To evaluate the correlation between CT urography (CTU) findings and histological grade of ureteral urothelial carcinoma (UUC), and to identify predictors of high-grade UUC. METHODS: CTU images of 73 patients with pathologically proven UUC via nephroureterectomy were independently reviewed by two radiologists for tumour size, tumour location, hydronephrosis grade, periureteral infiltration, presence of enlarged retroperitoneal lymph nodes and tumour enhancement value...
October 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28774661/current-techniques-and-clinical-applications-of-computed-tomography-urography
#8
REVIEW
Vijay Krishnan, Ashish Chawla, Kedar G Sharbidre, Wilfred C G Peh
From conventional radiograph to magnetic resonance urography, imaging of urinary system has evolved with variety of investigations over the past several decades with each of them having advantages and limitations of their own. In the current era, computed tomography (CT) has emerged as a preferred investigations for evaluation of the urinary tract. There are various techniques involved in performing CT urography (CTU) with triple bolus technique (TB-CTU) currently drawing a special attention because of its low radiation exposure...
July 8, 2017: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/28762684/-the-retroperitoneal-space
#9
Andrea Mancini, Mario Meola, Giuseppe Tarantino, Ilaria Petrucci, Giovanna Berardi, Cristoforo Cuzzola
We describe the case of a 45-year-old woman with a clinical history of breast cancer presenting with anuric renal failure, metabolic acidosis and bilateral grade 2-3 hydronephrosis. Following insertion of bilateral ureteral stents, urinary output was 5000 ml in the subsequent 24 hours with frankly bloody urine, after which anuria recurred. A new ultrasound examination showed hydronephrotic kidneys with properly positioned stents, a distended bladder free of clots and a hypo-anechoic, well-demarcated mass enveloping the aorta...
August 1, 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28720719/introduction-of-a-new-imaging-guideline-for-suspected-renal-colic-in-the-ed-reduces-ct-urography-utilisation
#10
Gabriel Blecher, Rob Meek, Diana Egerton-Warburton, Philip McCahy
BACKGROUND: Patients presenting to the ED with suspected renal colic are frequently imaged with CT urography (CTU), which rarely alters diagnosis or management. To reduce use of CTU in this population, we instigated a new imaging and management guideline in our ED. METHODS: This was a quasi-experimental prospective study, whereby a new guideline was commenced at the intervention site (Monash Medical Centre) and the existing guideline continued at the control site (Dandenong Hospital)...
November 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/28677000/bladder-cancer-diagnosis-with-ct-urography-test-characteristics-and-reasons-for-false-positive-and-false-negative-results
#11
Tony W Trinh, Daniel I Glazer, Cheryl A Sadow, V Anik Sahni, Nina L Geller, Stuart G Silverman
PURPOSE: To determine test characteristics of CT urography for detecting bladder cancer in patients with hematuria and those undergoing surveillance, and to analyze reasons for false-positive and false-negative results. METHODS: A HIPAA-compliant, IRB-approved retrospective review of reports from 1623 CT urograms between 10/2010 and 12/31/2013 was performed. 710 examinations for hematuria or bladder cancer history were compared to cystoscopy performed within 6 months...
July 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28670667/the-association-of-a-number-of-anatomical-factors-with-the-success-of-retrograde-intrarenal-surgery-in-lower-calyceal-stones
#12
Sercan Sari, Hakki Ugur Ozok, Hikmet Topaloglu, Mehmet Caglar Cakici, Harun Ozdemir, Ahmet Nihat Karakoyunlu, Aykut Bugra Senturk, Hamit Ersoy
PURPOSE: To determine anatomical factors affecting Retrograde Intrarenal Surgery (RIRS) success in the treatment of renal lower calyx stones. MATERIALS AND METHODS: The results of patients were evaluated retrospectively. The patients who have preoperative intravenous urography (IVU) and computed tomography (CT) were divided into two groups as successful (S)(N=103) and unsuccessful(U) (N=29). The anatomic characteristics such as infundibulopelvic angle (IPA), infundibular length (IL), infundibular width (IW) and pelvicaliceal height (PCH) values were compared among two groups...
July 2, 2017: Urology Journal
https://www.readbyqxmd.com/read/28653304/the-impact-of-pelvicalyceal-anatomy-on-the-stone-formation-in-patients-with-lower-pole-renal-stones
#13
Krzysztof Balawender, Stanisław Orkisz
BACKGROUND: The aim of our study was to determine whether various anatomic factors constitute a predisposition to a lower pole renal stones. METHODS: We analysed the computed tomography (CT) urography of 75 patients with a single lower pole stone. Measurements were taken of the infundibulopelvic angle (IPA),infundibular width (IW), infundibular length (IL) and calyceopelvic height (CPH). RESULTS: The mean patient age was 50 years (range 17-79)...
June 27, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28624023/enhanced-radiation-damage-caused-by-iodinated-contrast-agents-during-ct-examination
#14
Ling Wang, Qiang Li, Xi-Ming Wang, Guang-Yu Hao, Jie-Bao, Su Hu, Chun-Hong Hu
OBJECTIVE: To access the effect of iodinate contrast agent (ICA) on DNA double-stand breaks (DSBs) in human peripheral blood lymphocytes during computed tomography (CT) examinations. MATERIALS AND METHODS: This present study was approved by the institutional ethics committee; written informed patient consent was obtained from 70 patients. A total of 48 patients underwent computed tomography urography (CTU), in which only one time CT scanning was examined after injecting ICA, and 22 patients received unenhanced whole abdominal CT, among them 10 patients were selected to get ICA injection immediately after irradiation...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28606297/-spontaneous-renal-rupture-of-fornix-due-to-obstructing-urethral-stone
#15
Michael Asger Andersen, Rikke Tandrup Nielsen
A 53-year-old man was hospitalized due to acute right-sided flank pain. The pain went from right flank to right fossa. A non-contrast computed tomography (CT) of the abdomen showed pronounced stranding, hydronephrosis and proximal hydroureter. A CT urography showed oedema proximally around the right kidney and pyelogram. Due to lack of contrast excretion in the right kidney, initially "white kidney", there was need of an acute JJ-stent placement. No cause of obstruction was found during operation, however, after the stent placement, the patient was completely relieved of pain...
June 12, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28501271/virtual-cystoscopy-computed-tomography-urography-and-optical-cystoscopy-for-the-detection-and-follow-up-for-bladder-cancer
#16
D Ibáñez Muñoz, I Quintana Martínez, A Fernández Militino, D Sánchez Zalabardo, L Sarria Octavio de Toledo, R Cozcolluela Cabrejas
OBJECTIVES: To evaluate the utility of virtual cystoscopy (VC) performed with CT urography in patients being studied under gross hematuria or patients being followed-up after a previous bladder cancer and compare the results with those obtained with gold standard technique (optical cystoscopy). METHODS: Retrospective study of 117 patients who were referred for VC by the Urology Department between May 2014 and May 2015. Those patients presented with gross hematuria or they were previously treated patients from bladder cancer being followed up...
May 10, 2017: Radiología
https://www.readbyqxmd.com/read/28463522/optimization-of-split-bolus-ct-urography-effect-of-differences-in-allocation-of-contrast-medium-and-prolongation-of-imaging-delay
#17
RANDOMIZED CONTROLLED TRIAL
Dahye Lee, Eun-Suk Cho, Joo Hee Kim, Yong Pyo Kim, Hyeon-Kyeong Lee, Jeong-Sik Yu, Jae-Joon Chung
OBJECTIVE: The purpose of this study was to find the optimal allocation ratio of contrast medium (CM) in split-bolus CT urography (CTU) and to investigate the effect of increased imaging delays for synchronous nephrographic-excretory phase imaging. SUBJECTS AND METHODS: One hundred ninety-two patients were randomly assigned to one of three protocols with different allocation ratios of CM: group A, 30% of CM at first bolus and 70% of CM at second bolus; group B, 70% and 30%; or group C, 50% and 50%...
July 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28462168/mature-cystitic-teratoma-of-the-bladder-masquerading-as-a-distal-ureteral-stone
#18
Mohamed Omar, Mohamed El-Gharabawy, Ahmed Samir, Eid El Sherif, Manoj Monga
A 27-year woman presented with irritative lower urinary tract symptoms and alleged small right distal ureteric stone that had been diagnosed with KUB and non-contrast spiral CT. Patient was scheduled for ureteroscopic lithotripsy, revealing absence of the presumed stone, while cystoscopy showed unexpected 2 cm pedunculated grayish white lesion, situated on the right lateral wall of the bladder with sparse hairs covering it. An incomplete TURBT was done; the histological findings correlated with the gross picture seen on cystoscopy...
July 2017: Urology Case Reports
https://www.readbyqxmd.com/read/28389790/multidetector-ct-urography-in-urogenital-tuberculosis-use-of-reformatted-images-for-the-assessment-of-the-radiological-findings-a-pictorial-essay
#19
REVIEW
Caterina Gaudiano, Marina Tadolini, Fiorenza Busato, Elisa Vanino, Simone Pucci, Beniamino Corcioni, Rita Golfieri
Urogenital tuberculosis (UGTB) is the most common form of extrapulmonary TB and is responsible for a destructive inflammation of the renal parenchyma and urinary tract often leading to the loss of kidney function. For these reasons, the early diagnosis of this disease, once considered disappeared in developed countries, is very important to establish a prompt and efficient treatment. However, the subtle and non-specific symptoms, often represented by recurrent and persistent lower urinary tract symptoms, can confound and delay the diagnosis...
April 8, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28384174/assessment-of-the-ability-of-ct-urography-with-low-dose-multi-phasic-excretory-phases-for-opacification-of-the-urinary-system
#20
Hiroshi Juri, Takahiro Tsuboyama, Mitsuhiro Koyama, Kiyohito Yamamoto, Go Nakai, Atsushi Nakamoto, Kazuhiro Yamamoto, Haruhito Azuma, Yoshifumi Narumi
OBJECTIVE: To prospectively evaluate the ability of CT urography with a low-dose multi-phasic excretory phase for opacification of the urinary system. MATERIALS AND METHODS: Thirty-two patients underwent CT urography with low-dose multi-phasic s using adaptive iterative dose reduction 3D acquired at 5-, 10-, and 15-minute delays. Opacification scores of the upper urinary tracts and the urinary bladder were assigned for each excretory phase by two radiologists, who recorded whether adequate (>75%) or complete (100%) opacification of the upper urinary tract and urinary bladder was achieved in each patient...
2017: PloS One
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