Filters








31 Hits in 11.0 sec

Numerical Response Surfaces of Volume of Ablation and Retropulsion Amplitude by Settings of Ho:YAG Laser Lithotripter

Jian J. Zhang, Jonathan Rutherford, Metasebya Solomon, Brian Cheng, Jason R. Xuan, Jason Gong, Honggang Yu, Michael L. D. Xia, Xirong Yang, Thomas Hasenberg, Sean Curran
2018 Journal of Healthcare Engineering  
Although laser lithotripsy is now the preferred treatment option for urolithiasis due to shorter operation time and a better stone-free rate, the optimal laser settings for URS (ureteroscopic lithotripsy  ...  The best quadratic fit of the response surface for the volume of ablation varied nonlinearly with pulse duration and pulse number.  ...  Acknowledgments The authors thank David Horn of Boston Scientific Corp. for his assistance with preparing the holding basket of the tissue phantom for retropulsion test.  ... 
doi:10.1155/2018/8261801 pmid:29707187 pmcid:PMC5863310 fatcat:4ziyoptsnvgyjcgo6fnpjtjsnq

Developing Complete Ultrasonic Management of Kidney Stones for Spaceflight

Julianna C. Simon, Barbrina Dunmire, Michael R. Bailey, Mathew D. Sorensen
2016 Journal of Space Safety Engineering  
The incidence of kidney stones and the potential for a mission-critical event are expected to rise as expeditions become longer and immediate transport to Earth becomes more problematic.  ...  At the University of Washington, we are developing an ultrasound-based stone management system to detect stones with S-mode ™ ultrasound imaging, break stones with burst wave lithotripsy (BWL ™ ), and  ...  Acknowledgments The authors would like to thank contributors at the Center for Industrial  ... 
doi:10.1016/s2468-8967(16)30018-0 pmid:29034360 pmcid:PMC5640155 fatcat:alvuczgzejbdbhdbnmbpfgikiy

Ultrasonic propulsion of kidney stones

Philip C. May, Michael R. Bailey, Jonathan D. Harper
2016 Current Opinion in Urology  
The purpose of this review is to discuss the initial testing of effectiveness and safety, directions for refinement of technique and technology, and opinions on clinical application.  ...  Purpose of review-Ultrasonic propulsion is a novel technique that uses short bursts of focused ultrasonic pulses to reposition stones transcutaneously within the renal collecting system and ureter.  ...  Acknowledgments The work and review are part of a large collaborative effort, and we appreciate the help of our many collaborators at the UW Center for Industrial and Medical Ultrasound, in the UW Department  ... 
doi:10.1097/mou.0000000000000276 pmid:26845428 pmcid:PMC4821680 fatcat:b6jdnorqirgubkzciwhvzq6gyy

B-mode Ultrasound Versus Color Doppler Twinkling Artifact in Detecting Kidney Stones

Mathew D. Sorensen, Jonathan D. Harper, Ryan S. Hsi, Anup R. Shah, Manjiri K. Dighe, Stephen J. Carter, Mariam Moshiri, Marla Paun, Wei Lu, Michael R. Bailey
2013 Journal of endourology  
Video segments of the upper pole, interpolar area, and lower pole were created, randomized, and independently reviewed by three radiologists. Receiver operator characteristics were determined.  ...  This information may help users employ twinkling and B-mode to identify stones and developers to improve signal processing to harness the fundamental acoustic differences to ultimately improve stone detection  ...  Acknowledgments The authors would like to thank Dr. Oleg Sapozhnikov for initiating and guiding this research.  ... 
doi:10.1089/end.2012.0430 pmid:23067207 pmcid:PMC3573723 fatcat:r4tmdkunlrfbpnsoe4w3c53snu

Poster Session 9: Endourology

CUAJ Editorial
2016 Canadian Urological Association Journal  
The median time to resolution of the referred calculi from date of referral for the pre-EC, EC, and ASC cohorts was 42, 32, and 18 days, respectively (p<0.05 between all cohorts).  ...  30: U30) or soft (plaster of Paris: POP) stones.  ...  for treating symptomatic calculi.  ... 
doi:10.5489/cuaj.3990 fatcat:imoo36ddkbanhkczxdvvxjg3cq

Continuing Medical Education

D. M. Lierle, G. F. Reed
1970 Archives of Otolaryngology - Head and Neck Surgery  
resection or new methods to improve the outcome of shock wave lithotripsy.  ...  The status of robotic surgical devices offering haptic sense will be presented as well as recent developments of virtual reality surgical simulation in laparoscopic, endoscopic and percutaneous training  ...  The content is solely the responsibility of the authors and does not necessarily represent the official views of the NCI, JHU, or HMSA.  ... 
doi:10.1001/archotol.1970.04310020001001 fatcat:uuub5tzb7jdqvkcvlmetrs63zm

CUA Annual Meeting Abstracts 2008

CUAJ Editorial Office
2013 Canadian Urological Association Journal  
Materials and Methods: The NA study consisted of 560 men who underwent a prostate biopsy for an abnormal PSA or DRE. The EU study consisted of 459 men who had one or more biopsies for the same.  ...  The ORs (95% CI) comparing the highest quartile of fatty acid intake to the lowest equaled 0.44 (0.30-0.65) and 0.37 (0.25-0.55) for DHA and EPA, respectively.  ...  We sought to determine the diagnostic yield of image-guided FNA in a contemporary series. Renal FNA has an excellent diagnostic yield of 85%.  ... 
doi:10.5489/cuaj.995 fatcat:vldpgrcewfd5hlpmojkojpvpmu

Augmenting cost-SVM with gaussian mixture models for imbalanced classification

Miao He, Teresa Wu, Alvin Silva, Dianna-Yue Zhao, Wei Qian
2015 Artificial intelligence research  
The Support Vector Machine (SVM), a known discriminative classifier is ineffective in dealing with imbalanced classification problems where the training examples of target class are outnumbered by non-target  ...  Experimental results on eleven benchmark datasets and one medical imaging dataset show the effectiveness of CSG in dealing with imbalanced classification problems.  ...  Renal stone dataset Renal stones, also called kidney calculi, are the solid crystal aggregations formed in the kidneys from dietary minerals in the urine.  ... 
doi:10.5430/air.v4n2p93 fatcat:wszcgn6sxzeqloaivlh5xhqkbu

Canadian Urological Association, 63rd Annual Meeting, Edmonton, AB, June 22-25, 2008

2008 Canadian Urological Association Journal  
The probability for prostate cancer was 44.2%, 53.4% and 65.5% for patients with the CC, CA and AA genotypes, respectively (p = 3×10 −8 ).  ...  After adjusting for age, family history of prostate cancer, ethnicity, urinary voiding symptoms, PSA, free:total PSA ratio and DRE, the odds ratio for patients with the GG genotype was 2.0 (95% CI 1.1-  ...  by 4% (p = 0.009).Referrals for small renal stones < 11 mm 2 have not increased over time.Conclusion:The majority of referrals for SWL in the Greater Toronto Area are for renal Keywords: LITHOTRIPSY,  ... 
pmid:18682823 pmcid:PMC2494884 fatcat:cjzgt3vfnbbhjdt3yhkm3ebwau

Management of Benign Head and Neck Tumors

Mahyar Mohammadifard, Godratallah Naseh
2014 Iranian Journal of Radiology  
The Iranian Journal of Radiology is the official journal of Tehran University of Medical Sciences and the Iranian Society of Radiology.  ...  and course of the illness are taken into consideration.  ...  At the same time, formidable limitations and challenges remain for MR urography, including its relative insensitivity for renal calculi, relatively long imaging times, sensitivity to motion, and lower  ... 
doi:10.5812/iranjradiol.21427 fatcat:sjwvn72hkrdhjokjbumorlk2hu

Correct answers to multiple choice questions appearing in the European Urology Update Series 2002

2003 BJU International  
The incidence of renal calculi is similar to that in nonpregnant subjects and not increased in woman known to be 'stone-formers' .  ...  The safety of lithotripsy has not been fully evaluated. 4 . a Fertility and the ability to sustain pregnancy are linked to the degree of functional renal impairment and the presence of hypertension rather  ...  b Unlike obstruction of the ureter, which leads to diffuse dilatation and thinning of the ureter, a ureterocele is a cystic dilatation of the intravesical ureter alone and there is an abnormal abundance  ... 
doi:10.1046/j.1464-410x.2003.00912.x fatcat:aeg6elbhmzemngvmhtui5plyma

Podium Session 2: Oncology

CUAJ Editorial Office
2012 Canadian Urological Association Journal  
MP-01.07 Is There a Role for Routine Anterior Zone Sampling during Transrectal Ultrasound Guided Saturation Prostate Biopsy  ...  The degree of dose reduction that preserves diagnostic accuracy for tiny calculi remains uncertain, but may be influenced by further improvements in iterative reconstruction techniques.Does a Routine Baseline  ...  A total of 29 renal calculi (range, 1-22 mm; mean, 4.1 mm) were identified at MP-02.05 Table 3 . 3 .  ... 
doi:10.5489/cuaj.1306 fatcat:xqs7q6dgsvdodc7ukmb4577lqq

2011 CUA Abstracts

2011 Canadian Urological Association Journal  
Inclusion criteria for active surveillance were PSA <10 ng/mL, clinical stage T1c/T2a, Gleason score <6, and <3 cores positive with no more than 50% of a core involved at initial diagnostic biopsy.  ...  Our goal was to determine the effect of 5ARIs on pathologic progression in men on active surveillance for prostate cancer.  ...  Methods: This is a retrospective study of 150 men referred for an evaluation of lower urinary tract symptoms and who underwent an urodynamic study.  ... 
pmid:21679673 pmcid:PMC3125591 fatcat:tfwe3y72mzdqffydbxszrgf7rq

2017 CUA abstracts

CUAJ Editorial
2017 Canadian Urological Association Journal  
The positive predictive value (PPV) for Gleason 7 or higher cancer for Prostate Imaging Reporting and Data System (PI-RADS) score 1-2, 3,4, and 5 was 13%, 29%, 24%, and 33%, respectively. 2/12 (16.7%)  ...  The negative predic-tive value (NPV) of PI-RADS 1-2 for Gleason ≥7 was 89%. The results of targeted vs. systematic biopsy in the MRI arm is listed in Table 1 .  ...  At the VAT1 level, 24-hour urinalysis was significant for high levels of phosphate, citrate, and calcium (all p<0.05), but were non-significant at the VAT2 level.  ... 
doi:10.5489/cuaj.4728 fatcat:73eow4zhrjakhofb3fihojpcfq

2012 CUA Abstracts

2012 Canadian Urological Association Journal  
Exponential smoothing models were utilized to assess for trends over time in the percent utilization of each of SWL, URS and PCNL.  ...  Our objective was to evaluate population-based trends in the use of extracorporeal shockwave lithotripsy (SWL), URS and percutaneous nephrolithotomy (PCNL) over the past 20 years, in Ontario.  ...  Biochemical failure (BF) was defined according to the American Society for Therapeutic Radiology and Oncology Phoenix definition of a rise of ≥2 ng/mL above the nadir.  ... 
pmid:22709920 pmcid:PMC3381835 fatcat:pborntli35dzfbvsplzbc6cgha
« Previous Showing results 1 — 15 out of 31 results