Implications of Cone Beam CT Peripheral Edge Blurring and Signal Attenuation for Interventional Procedures

Cone-Beam CT with Flat-Panel-Detector Digital Angiography System: Early Experience in Abdominal Interventional Procedures

CardioVascular and Interventional Radiology ◽

10.1007/s00270-005-0287-6 ◽

2006 ◽

Vol 29 (6) ◽

pp. 1034-1038 ◽

Cited By ~ 104

Author(s):

Shozo Hirota ◽

Norio Nakao ◽

Satoshi Yamamoto ◽

Kaoru Kobayashi ◽

Hiroaki Maeda ◽

...

Keyword(s):

Interventional Procedures ◽

Cone Beam Ct ◽

Early Experience ◽

Cone Beam ◽

Digital Angiography ◽

Flat Panel ◽

Flat Panel Detector

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C-arm Fluoroscopic Cone Beam CT for Guidance of Minimally Invasive Spine Interventions

January 2018 - Pain Physician ◽

10.36076/ppj.2010/13/51 ◽

2010 ◽

Vol 1;13 (1;1) ◽

pp. 51-59

Author(s):

Michael F. Powell

Keyword(s):

Interventional Procedures ◽

Cone Beam Ct ◽

Cone Beam ◽

Imaging Guidance ◽

High Resolution Image ◽

Volume Imaging ◽

Vertebral Biopsy ◽

A New Technique ◽

Conventional Ct ◽

Biplane Fluoroscopy

Background: Isocentric C-arm fluoroscopic cone beam CT (CBCT) is a new technique for near real time 3-D volume imaging guidance of percutaneous interventional procedures. In combination with digital flat panel detectors, CBCT has high spatial resolution with isotropic voxel size, allowing for high resolution image reconstruction in any plane, including 3D rotational reconstructions. CBCT combines the advantages of conventional CT imaging guidance with the improved spatial resolution, patient positioning, and access of fluoroscopy. Objective: The aim of this study is to demonstrate the advantages of CBCT over conventional CT and biplane fluoroscopy for imaging guidance of minimally invasive spinal and paraspinal interventional procedures. Methods: Five patients referred to the department of interventional neuroradiology for percutaneous spinal or paraspinal interventional procedures were intraoperatively evaluated with CBCT to assist in guidance of instrumentation placement. Procedures included transoral cervical vertebral biopsy, percutaneous thoracic vertebral biopsy, vertebroplasty, pelvic paraspinal/epidural abscess drainage, and paraspinal fiducial marker placement for treatment of osteoid osteoma. Results: All procedures were successfully performed with satisfactory diagnostic yield or therapeutic effect without procedure-related complications. Conclusion: Isocentric C-arm fluoroscopic cone beam CT (CBCT) is a new technique for 3D volume imaging guidance of interventional procedures of the spine with the capability to produce near real time high resolution image reconstructions in any plane. Compared to conventional CT and biplane fluoroscopy, CBCT offers improved anatomic visualization allowing high accuracy instrumentation placement, improving procedure results and minimizing risk of complications. Key words: Vertebroplasty, kyphoplasty, biopsy, computed tomography, CT, fluoroscopy, Carm, percutaneous, interventional radiology, imaging guidance

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Development and clinical evaluation of MR-guided focused ultrasound for 'tattooing' tumors to guide radiotherapy as well as other therapies

10.31225/osf.io/yc5xv ◽

2018 ◽

Author(s):

Gregory Karczmar

Keyword(s):

Radiation Therapy ◽

Optical Sensors ◽

Normal Tissue ◽

Interventional Procedures ◽

Focused Ultrasound ◽

Cone Beam Ct ◽

Ct Scans ◽

Cone Beam ◽

Cancer Model ◽

Mri Guidance

We hypothesize that focused ultrasound can be used – under MRI guidance - to delineate cancers as well as other pathologies with a precise pattern of small ablation marks that precisely show the position and boundaries of tumors. These tattoos can be designed to be highly conspicuous visually, using optical sensors, and/or on CT or Ultrasound. In the present application we focus on optimizing the conspicuity of the lesions on cone-beam CT scans, in order to guide radiotherapy. This pattern of ‘tattoos’ can be encoded very rapidly because the total volume of the ‘tattoos’ will be very small. Conspicuity of the ‘tattoos’ will be maximized by developing a heating protocol that first produces hemorrhage with mild heating, and subsequently increases heating to ‘fix’ the hemorrhaged blood in the tissue. Conspicuity of the ‘tattoos’ will be further increased by using focused ultrasound to trap a variety of contrast agents. The tattoos can be used to guide surgery, radiotherapy, biopsies and other interventional procedures. Use of HIFU to produce the tattoos will be clinically acceptable, since the tattoos will cause far less tissue damage than the subsequent therapy they are designed to guide, and the tattoos can be very rapidly encoded. In fact, by guiding the therapeutic intervention more accurately, the tattoos can reduce damage caused by therapy in normal tissue. In this application we develop and test the use of ‘HIFU tattoos’ to guide radiation therapy of cancer in a pre-clinical rabbit cancer model.

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