scholarly journals Initial experiences with preoperative three-dimensional image reconstruction technology in laparoscopic pyeloplasty for ureteropelvic junction obstruction

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Weijie Zhu ◽  
Shengwei Xiong ◽  
Chunru Xv ◽  
Zhenpeng Zhu ◽  
Zhihua Li ◽  
...  
Author(s):  
R. A. Crowther

The reconstruction of a three-dimensional image of a specimen from a set of electron micrographs reduces, under certain assumptions about the imaging process in the microscope, to the mathematical problem of reconstructing a density distribution from a set of its plane projections.In the absence of noise we can formulate a purely geometrical criterion, which, for a general object, fixes the resolution attainable from a given finite number of views in terms of the size of the object. For simplicity we take the ideal case of projections collected by a series of m equally spaced tilts about a single axis.


2005 ◽  
Vol 173 (4S) ◽  
pp. 228-228
Author(s):  
Scott V. Burgess ◽  
Michael M. Woods ◽  
Freddy Mendez-Torres ◽  
Erik P. Castle ◽  
Raju Thomas

Radiographics ◽  
2005 ◽  
Vol 25 (1) ◽  
pp. 121-134 ◽  
Author(s):  
Leo P. Lawler ◽  
Thomas W. Jarret ◽  
Frank M. Corl ◽  
Elliot K. Fishman

2015 ◽  
Vol 9 (11-12) ◽  
pp. 775 ◽  
Author(s):  
Pejman Shadpour ◽  
H. Habib Akhyari ◽  
Robab Maghsoudi ◽  
Masoud Etemadian

Introduction: We report our experience with laparoscopic management of ureteropelvic junction obstruction in horseshoe kidneys.Methods: Between February 2004 and March 2014, 15 patients with horseshoe kidneys and symptomatic ureteropelvic junction obstruction underwent laparoscopic management at our national referral centre. Depending on the anatomy and presence of obtrusive vessels or isthmus, we performed either dismembered, Scardino or Foley YV pyeloplasty, or Hellstrom vessel transposition. Patients were initially evaluated by ultrasonography, then diuretic scintiscan at 4 to 6 months, and followed by yearly clinical and sonographic exams.Results: This study included 11 male and 4 female patients between the ages of 4 to 51 year (average 17.7). The left kidney was involved in 12 patients (80%). Operation time was 129 minutes (range: 90–186), and patients were discharged within 2.8 days (range: 1–6). Although 8 (53.3%) patients had crossing vessels, of which 6 required transposing, the Hellstrom technique was solely used in 3 cases, of which notably 1 case failed to resolve and required laparoscopic Hynes within the next year. Eight cases underwent dismembered pyeloplasty, 2 Foley YV, 1 Scardino flap and 1 required isthmectomy and vessel suspension. At the mean follow-up of 60 (range: 18–120) months, the overall success rate was 93.3%.Conclusions: To our knowledge, this represents the largest report on laparoscopic pyeloplasty for horseshoe kidneys, providing the longest follow-up. Our findings confirm prior reports supporting laparoscopy and furthermore show that despite the prevalence of crossing vessels, transposition alone is seldom sufficient.


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