PV-0376: Contrast-enhanced respiration managed cone-beam CT for image-guided intrahepatic radiotherapy

On Board Cone Beam CT for Treatment Planning in Image Guided Radiotherapy

Volume-of-change cone-beam CT for image-guided surgery.

C-arm cone-beam CT (CBCT) can provide intraoperative 3D imaging capability for surgical guidance, but workflow and radiation dose are the significant barriers to broad utilization. One main reason is that each 3D image acquisition requires a complete scan with a full radiation dose to present a completely new 3D image every time. In this paper, we propose to utilize patient-specific CT or CBCT ...

Contrast enhanced imaging of human meniscus using cone beam CT.

OBJECTIVE Meniscal injuries can lead to mechanical overloading of articular cartilage and eventually to knee osteoarthritis. The objective was to evaluate the potential of contrast enhanced computed tomography (CECT) to image contrast agent (CA) diffusion in human menisci with a clinical cone beam CT scanner. DESIGN Isolated human menisci (n = 26) were imaged using magnetic resonance imaging ...

Investigation of the radiation dose from cone‐beam CT for image‐guided radiotherapy: A comparison of methodologies

Four methodologies were evaluated for quantifying kilovoltage cone-beam computed tomography (CBCT) dose: the Cone-Beam Dose Index (CBDI), IAEA Report 5 recommended methodology (IAEA), the AAPM Task Group 111 methodology (TG111), and the current dose metric; the Computed Tomography Dose Index (CTDI) on two commercial Varian cone-beam CT imaging systems; the Clinac iX On-Board Imager (OBI); and t...

Implementation of single-breath-hold cone beam CT guided hypofraction radiotherapy for lung cancer

BACKGROUND To analyze the feasibility of active breath control (ABC), the lung tumor reproducibility and the rationale for single-breath-hold cone beam CT (CBCT)-guided hypofraction radiotherapy. METHODS Single-breath-hold CBCT images were acquired using ABC in a cohort of 83 lung cancer patients (95 tumors) treated with hypofraction radiotherapy. For all alignments between the reference CT a...