Cone-Beam CT image contrast and attenuation-map linearity improvement (CALI) for brain stereotactic radiosurgery procedures

Segmentation of Cone Beam CT in stereotactic radiosurgery

C-arm Cone Beam CT (CBCT) systems – due to compact size, flexible geometry and low radiation exposure – inaugurated the era of on-board 3D image guidance in therapeutic and surgical procedures. Leksell Gamma Knife Icon by Elekta introduced an integrated CBCT system to determine patient position prior to surgical session, thus advancing to a paradigm shift in facilitating frameless stereotactic ...

Pretreatment setup verification by cone beam CT in stereotactic radiosurgery: phantom study

Kilovoltage cone beam computed tomography (CBCT) imaging may be useful in verifying patient position in stereotactic radiosurgery (SRS). To evaluate its efficacy, we investigated isocenter differences in the radiation beam and CBCT with respect to the achievable setup of a conventional frame-based SRS system. A verification phantom constructed from two plastic boards and Gafchromic-EBT film (4 ...

Stereotactic radiosurgery for brain metastases.

Worldwide, approximately 100,000 patients have undergone stereotactic radiosurgery for a variety of intracranial lesions, of which brain metastases represent the most common treatment indication. This article summarizes the major issues surrounding the management of brain metastases, and also analyzes 21 independent reports of Gamma Knife- or linear accelerator-based radiosurgery, representing ...

Stereotactic Radiosurgery for Brain Tumors

Stereotactic Radiosurgery (SRS) is a non-invasive technique for the delivery of highly focused ionizing radiation with extreme precision. It is used in neurosurgical practice as a less invasive means of targeting benign and malignant brain tumors, vascular malformations, and functional disorders. Its ability to elicit a desired response (e.g. tumor cell death) with minimal effect on normal surr...

Common Image Artifacts in Cone Beam CT