Experience with Endoluminal Ultrasonography in the Urinary Tract

Lee, David I.; Bagley, Demetrius H.; Liu, Ji‐Bin

doi:10.1089/08927790150500980

Cited by 32 publications

(15 citation statements)

References 23 publications

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“…Many efforts have been made to assess cancer stage and grade preoperatively, including the use of sophisticated biopsy devices and endoluminal ultrasound3,4. However, an aggressive biopsy technique involves a risk of ureteral perforation and has a low success rate; ultrasound does not have sufficient resolution to stage early ureteral cancer.…”

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confidence: 99%

Three-dimensional Imaging of Ureter With Endoscopic Optical Coherence Tomography

Wang

Kang

Zhu

et al. 2011

Urology

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OBJECTIVES To verify the ability to identify the layered structures of ureteral wall and to image a segment of ureter in three dimensions with a high speed endoscopic optical coherence tomography (EOCT). METHODS We imaged a porcine ureter ex vivo using a spectral domain EOCT with an specially designed circumferential scanning fiber catheter. The images were correlated with the histology to identify corresponding structures. Three-dimensional images and en face images at different depths from the luminal surface were reconstructed from the multiple cross-sectional images to visualize the layered structure of a segment of the ureter from different perspectives. RESULTS EOCT images can clearly reveal all layers of the ureteral wall as shown in the histological images. Especially, with the specially designed fiber catheter, the light beam was well centered during the rotation and pull back, which allowed constant acquisition of high fidelity images and unambiguous identification of the smooth muscle layers in all images. With high speed EOCT, a segment of ureter (20 mm) can be imaged in less than 90 seconds at a high resolution. CONCLUSIONS With its ability to visualize all layers of the ureteral wall, EOCT imaging offers the potential to stage urothelial cancers that have infiltrated the muscular wall (stage T2). This information will be complimentary to the diagnostic information obtained through ureteroscopic biopsy and CT urogram.

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confidence: 99%

Three-dimensional Imaging of Ureter With Endoscopic Optical Coherence Tomography

Wang

Kang

Zhu

et al. 2011

Urology

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“…IVUS uses a high‐frequency transducer placed on the tip of a catheter and provides a high‐resolution, cross‐sectional image perpendicular to the long axis of the vessels. This technique is commonly used for coronary interventions, but, has been applied recently to the urinary tract, pancreatic duct, bile duct, portal vein, and mesenteric artery to detect tumoral infiltration. IVUS enables clear visualization of the wall of the IVC as a single‐layered echogenic ring, which allows differentiation between compression of the vessel wall and tumor invasion.…”

Section: Discussionmentioning

confidence: 99%

Preoperative intravascular ultrasonographic evaluation of leiomyosarcoma of the inferior vena cava: A case report

Chiba

Hamamoto

Tanaka

et al. 2019

J of Clinical Ultrasound

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Leiomyosarcoma of the inferior vena cava is a rare malignant tumor originating from smooth muscle cells of the vascular media. Its preoperative diagnosis by conventional noninvasive examinations such as abdominal ultrasonography, X‐ray computed tomography, and magnetic resonance imaging, may be difficult because of their nonspecific findings. We present the case of a 72‐year‐old woman with leiomyosarcoma of the inferior vena cava diagnosed by intravascular ultrasonography.

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“…When endoscopic techniques are employed for UPJ obstruction, endoluminal ultrasound has proven a valuable adjunct to better map the anatomy and diagnose crossing vessels before cautery or laser endopyelotomy. 9 The use of electrosurgical devices has been replaced by holmium laser in our practice.…”

Section: Discussionmentioning

confidence: 99%