A method for guide wire tracking in X-Ray angiographic images based on open active contours

2016 ◽  
Author(s):  
Cheng Wang ◽  
Wei Wang
Keyword(s):  
Active Contours ◽  
Guide Wire ◽  
X Ray

scholarly journals A Symptomatic Coffee Bean: Acute Sigmoid Volvulus

2017 ◽  
Vol 11 (2) ◽  
pp. 348-351 ◽  
Author(s):  
Michael Scharl ◽  
Luc Biedermann
Keyword(s):  
Sigmoid Colon ◽  
Guide Wire ◽  
Outlet Obstruction ◽  
Primary Treatment ◽  
Sigmoid Volvulus ◽  
Coffee Bean ◽  
Diagnostic Colonoscopy ◽  
X Ray ◽  
Abdominal Emergency ◽  
Distended Abdomen

An acute sigmoid volvulus is due to the torsion of the sigmoid colon around its mesenteric axis. It mainly occurs in elderly patients and represents an abdominal emergency requiring urgent treatment. A 53-year-old male patient with severe craniocerebral injury and traumatic subarachnoidal bleeding 3 weeks prior presented on the ward with distended abdomen without abdominal pain, muscular defense, or resistances. He featured large volume diarrhea within the last few hours without signs of bleeding. A plain abdominal X-ray demonstrated a coffee bean sign indicating a sigmoid volvulus. A consequent CT scan of the abdomen revealed a deep outlet obstruction with massively dilated, elongated and twisted loop of the sigmoid colon and no signs of perforation. We performed emergency colonoscopy under the assumption of an acute sigmoid volvulus. After careful insertion of the endoscope completely refraining from insufflation of air or CO2, endoscopic reposition of the sigma could be achieved and a colonic drainage was placed over an inserted guide wire up to the proximal transverse colon. No relapse occurred and a diagnostic colonoscopy after 4 weeks revealed no tumor or polyps. Our report describes a classic case of acute sigmoid volvulus and undermines the potential of colonoscopy as conservative primary treatment of choice.

scholarly journals Robotic-assisted internal fixation of hip fractures: A fluoroscopy-based intraoperative registration technique

2000 ◽  
Vol 214 (2) ◽  
pp. 165-179 ◽  
Author(s):  
I Browbank ◽  
K Bouazza-Marouf ◽  
J Schnabler
Keyword(s):  
Internal Fixation ◽  
Hip Fractures ◽  
Orthopaedic Surgery ◽  
Guide Wire ◽  
Drilling Process ◽  
Robotic Assisted ◽  
X Ray ◽  
Pilot Hole ◽  
Hip Screw

The internal fixation of proximal femoral (hip) fractures is the most frequently performed orthopaedic surgery procedure. When using a sliding compression hip screw, a commonly used fixation device, accurate positioning of the device within the femoral neck-head is achieved by initially drilling a pilot hole. A cannulated component of the hip screw is then inserted over the guide wire (surgical drill bit), which is used to drill the pilot hole. However, in practice, this fluoroscopically controlled drilling process is severely complicated by a depth perception problem and, as such, a surgeon can require several attempts to achieve a satisfactory guide wire placement. A prototype robotic-assisted orthopaedic surgery system has therefore been developed, with a view to achieving accurate right-first-time guide wire insertions. This paper describes the non-invasive digital X-ray photogrammetry-based registration technique which supports the proposed robotic-assisted drilling scenario. Results from preliminary laboratory (in vitro) trials employing this registration technique indicate that the cumulative error associated with the entire X-ray guided robotic system is within acceptable limits for the guide wire insertion process.

scholarly journals Surgical Precision and Efficiency of a Novel Electromagnetic System Compared to a Robot-Assisted System in Percutaneous Pedicle Screw Placement of Endo-LIF

2021 ◽  
pp. 219256822110255
Author(s):  
Derong Xu ◽  
Xuexiao Ma ◽  
Lei Xie ◽  
Chuanli Zhou ◽  
Biao Kong
Keyword(s):  
Pedicle Screw ◽  
Navigation System ◽  
Guide Wire ◽  
Screw Placement ◽  
Pedicle Screw Placement ◽  
Robot Assisted ◽  
Electromagnetic Navigation ◽  
X Ray ◽  
Percutaneous Pedicle Screw ◽  
Electromagnetic Navigation System

Study Design: Retrospective database study. Objectives: To compare the accuracy and safety of 2 types of a computer-assisted navigation system for percutaneous pedicle screw placement during endoscopic lumbar interbody fusion. Methods: From May 2019 to January 2020, data of 56 patients who underwent Endo-LIF with a robot-assisted system and with an electromagnetic navigation system were compared. The pedicles in all patients were subjected to postoperative CT scan to assess screw correction by measuring the perpendicular distance between the pedicle cortical wall and the screw surface. The registration and matching time, guide-wire insertion time, the entire surgery time, and X-ray exposure time were recorded. Results: In the robot-assisted group, 25 cases with 100 percutaneous pedicle screws were included, and the excellent and good rate was 95%. In the electromagnetic navigation group, 31 cases with 124 screws were included, and the excellent rate was 97.6%. There was no statistical difference between the two groups ( P > 0.05). The registration time and the total time for the surgery also showed no statistical differences ( P > 0.05). The main difference between the two groups was the guide-wire insertion time and the X-ray exposure time ( P < 0.05). Conclusions: Both electromagnetic navigation and robot-assisted are safe and efficient for percutaneous pedicle screw placement. Electromagnetic navigation system has obvious advantages over robot-assisted in terms of faster guide-wire placement and less X-ray exposure. Robot-assisted for percutaneous pedicle screw placement offers a preoperative planning system and a stable registration system, with obvious drawbacks of a strict training curve.

scholarly journals X-ray guided placement of Freka Trelumina using a guide wire for treatment of acute pancreatitis

2017 ◽  
Vol 25 (4) ◽  
pp. 369
Author(s):  
Lin Yuan ◽  
Jun Jiang ◽  
Ping Zhang ◽  
Gui-Fang Yang
Keyword(s):  
Acute Pancreatitis ◽  
Guide Wire ◽  
X Ray

Active contours with prior corner detection to extract discontinuous boundaries of anatomical structures in X-ray images

2015 ◽  
Vol 9 (3) ◽  
pp. 202-210 ◽  
Author(s):  
Aruni U.A. Niroshika ◽  
Donna K.S. Kannangara ◽  
Ravindra S. Lokupitiya ◽  
Ravinda G.N. Meegama
Keyword(s):  
Active Contours ◽  
Corner Detection ◽  
Anatomical Structures ◽  
X Ray

Identifying and tracking a guide wire in the coronary arteries during angioplasty from X-ray images

1997 ◽  
Vol 44 (2) ◽  
pp. 152-164 ◽  
Author(s):  
D. Palti-Wasserman ◽  
A.M. Brukstein ◽  
R.P. Beyar
Keyword(s):  
Coronary Arteries ◽  
Guide Wire ◽  
X Ray

scholarly journals Localization of endovascular tools in X-ray images using a motorized C-arm: visualization on HoloLens

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Yenjung Chen ◽  
Nilay Yatinkumar Shah ◽  
Subhra Sundar Goswami ◽  
Annkristin Lange ◽  
Felix von Haxthausen ◽  
...  
Keyword(s):  
Guide Wire ◽  
Three Dimensional ◽  
Arm Movements ◽  
Ground Truth ◽  
Depth Information ◽  
X Ray ◽  
Image Guided ◽  
Computed Tomography Scans ◽  
The Mean ◽  
Tip Position

AbstractC-arms are medical devices widely used for image-guided minimally invasive endovascular procedures. This technology requires considerable experience for the physicians to position the C-arm to obtain X-ray images of the endovascular tools. In addition, this image-guided therapy is based on two-dimensional images which lack depth information. The purpose of this study was to develop a system that controls the C-arm movements based on the previous position of the tip of a guide wire and the vessel information, and also displays the estimated tip position (specifically, the virtual line that would join the X-ray source and the projected tip in the flat-panel detector) on an augmented reality device (HoloLens). A phantom study was conducted to evaluate the system using intraoperative cone-beam computed tomography scans to obtain the reference tip position. The mean distance between the tip position (ground truth) and the virtual three-dimensional line was 1.18 mm. The proposed system was able to control the C-arm movements based on the position of the tip of the guide wire. The visualization on HoloLens also allowed a more intuitive understanding of the position of the endovascular tool related to the patient’s anatomy during the intervention.

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