Linear Time Invariant Model based Motion Correction (LiMo-MoCo) of Dynamic Radial Contrast Enhanced MRI.

We present a bulk motion detection and a linear time invariant (LTI) model-based motion correction approach for DCE-MRI alignment that leverages the temporal dynamics of the DCE data at each voxel. We evaluate our approach on 10 newborn patients that underwent DCE imaging without sedation. For each patient, we reconstructed the sequence of DCE images, detected and removed the volumes corrupted by motion using a self navigation approach, aligned the sequence using our approach and fitted the TK model to compute GFR. The results show that our approach correctly aligned all volumes and improved the TK model fit and, on average, reducing the normalized root-mean-squared error by 0.17. PMID: 32483560 [PubMed]
Source: MICCAI International Conference on Medical Image Computing and Computer-Assisted Intervention - Category: Radiology Tags: Med Image Comput Comput Assist Interv Source Type: research

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We report a 71-year-old woman who presented with unilateral flank pain and sepsis. A computed tomographic (CT) scan demonstrated left-sided hydronephrosis. Subsequent percutaneous nephrotomy drainage showed pus-like material, confirming the diagnosis of pyonephrosis. The ureteral stricture was caused by previous radiation injury for cervical cancer in this ESRD patient who was on chronic dialysis for years. In our case, the grade IVB hydronephrosis is a result of an extremely atrophic kidney, pyonephrosis, and ureteral stricture. The CT section of pyonephrosis in an extremely atrophic kidney resembles a sagittal section of...
Source: Clinical and Experimental Nephrology - Category: Urology & Nephrology Source Type: research
IgG4 ‐RD may rarely present as a retroperitoneal fibrosis, mimicking carcinomatosis. Clinicians should consider this disease when encountering an idiopathic peritoneal and retroperitoneal fibrosis with renal involvement and hydronephrosis. AbstractIgG4 ‐RD may rarely present as a retroperitoneal fibrosis, mimicking carcinomatosis. Clinicians should consider this disease when encountering an idiopathic peritoneal and retroperitoneal fibrosis with renal involvement and hydronephrosis.
Source: Clinical Case Reports - Category: General Medicine Authors: Tags: CASE REPORT Source Type: research
Conditions:   Ureteral Stricture;   Hydronephrosis;   Radiation Exposure Interventions:   Device: Coated metal ureteral stent(CMUS);   Device: Double-J stent(DJS) Sponsor:   Peking University People's Hospital Not yet recruiting
Source: - Category: Research Source Type: clinical trials
Conclusion: In the treatment of 2-4 cm renal stone, using V-UAS in RIRS can improve surgical efficiency with lower postoperative early pain scores. Comparing with MPCNL, its initial SFR was more depressed, and there is still a trend towards requiring more auxiliary procedures to achieve comparable final SFR. PMID: 32509870 [PubMed - in process]
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
This study aimed to investigate the clinical significance of urinary kidney injury molecule-1 (KIM-1) to monitor renal function in patients with obstructive unilateral ureteral calculi.MethodsKidneys of 12 male C57BL/6J mice, as well as their urine and plasma specimens, were extracted to detect KIM-1 expressions 24  h after unilateral ureteral obstruction (UUO) construction or sham surgery. Meanwhile, a cohort of 89 patients with unilateral ureteral calculi was retrospectively reviewed. 46 of which received double-J ureteral stent indwelling (group 1) and the remaining 43 were treated conservatively (group 2) . Urinar...
Source: International Urology and Nephrology - Category: Urology & Nephrology Source Type: research
A 66-year-old male, with an undiagnosed duplex system, underwent a Robotic-assisted Radical Prostatectomy that was complicated by an ectopic ureter injury. Given the incidence of less than 0.001%, management of ectopic ureters for patients undergoing a RARP is foreign to most urologists. The delayed presentation lead us to opt for selective angioembolisation of the hydronephrotic segment. Symptoms completely resolved and a follow up scan showed resolution of the hydronephrosis as well as hypovascularized parenchyma of the upper moiety.
Source: Urology - Category: Urology & Nephrology Authors: Tags: Grand Rounds Source Type: research
Authors: Kuwabara-Ohmura Y, Iizuka K, Liu Y, Takao K, Nonomura K, Kato T, Mizuno M, Hosomichi K, Tajima A, Miyazaki T, Horikawa Y, Yabe D Abstract Pancreatic tail hypoplasia is a common manifestation of maturity onset diabetes of the young (MODY) 5 that can cause reno-genito-urinary malformations such as renal cysts and bicornuate uterus. A 69-year-old female was admitted to our hospital for consultation on her relatively high HbA1c value. At age 20, she was diagnosed with uterus bicornis. At age 68, she was diagnosed with pancreas tail hypoplasia, renal cysts and non-functioning pancreatic neuroendocrine tumor (NE...
Source: Endocrine Journal - Category: Endocrinology Tags: Endocr J Source Type: research
In this report, we present three children with cystic renal tumors extending into the ureter and review the relevant literature.
Source: Urology - Category: Urology & Nephrology Authors: Source Type: research
Eur J Pediatr Surg DOI: 10.1055/s-0040-1712172 Introduction Ureteric reimplantation due to ureterovesical junction (UVJ) obstruction enjoys high success in the short term. However, renal function after reimplantation must accommodate the numerous changes in the pediatric urinary tract that occur along with child development that may theoretically cause an occult loss of renal function. The purpose of this study was to evaluate whether improved renal function after ureter reimplantation for antenatal diagnosed UVJ obstruction remains stable after puberty. Materials and Methods Twenty-one children who underwe...
Source: European Journal of Pediatric Surgery - Category: Surgery Authors: Tags: Original Article Source Type: research
Conclusions: US-guided MPCNL showed an excellent SFR and low complication rate in the management of pediatric patients with upper ureteral and renal stones. PMID: 32401098 [PubMed - as supplied by publisher]
Source: Journal of Investigative Surgery - Category: Surgery Tags: J Invest Surg Source Type: research
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