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PREDICTING X-RAY ZONE AND PROJECTING IT ON THE PATIENT OR TABLE FOR C-ARMS

IP.com Disclosure Number: IPCOM000239951D
Publication Date: 2014-Dec-17

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention includes a technique to provide visual indication of an X-ray exposure area on a patient in an X-ray system. The technique provides change in X-ray exposure area with respect to change in collimator position, which includes IRIS, leaves, and shutter and is shown on the patient body in real time. The invention proposes four types of solutions to acquire the X-ray exposure area. The first solution includes utilizing two projectors on detector sides. The second solution includes utilizing line laser or dot lasers. The third solution includes concave mirror with a stationary projector and the fourth solution includes concave mirror with moving projector.

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PREDICTING X-RAY ZONE AND PROJECTING IT ON THE PATIENT OR TABLE FOR C-ARMS

FIELD OF INVENTION

The invention generally relates to an X-ray system and more particularly to a technique for providing visual indication of X-ray exposure area on a patient in the X-ray system.

BACKGROUND OF THE INVENTION

Generally, it is difficult for a doctor to predict and project part of an anatomy which is covered in an X-ray shot. An X-ray system utilizes a collimator which includes components, such as a shutter, iris and leaves. The components further complicate the process to acquire area of interest or part of an anatomy. In most cases a low dose shot is acquired to check whether area of interest is covered or not. Acquiring low dose X-ray shot is a trial and error process. The low dose acquisition process is repeated when a C-arm angle or patient position is changed. Due to acquisition of extra X-ray shots to check alignment, a patient ends up getting extra dose of X-ray.

A conventional technique includes a light source in a generator to simulate an X-ray beam.

Another conventional technique includes utilization of two or more than two mirrors to project light on the patient.

However, the conventional techniques do not work when the generator is placed in bottom of a patient table.

Hence there exists a need for an efficient technique to predict and project X-ray exposure area when the generator is placed under a table which is configured with a high power C-arm.

BRIEF DESCRIPTION OF THE INVENTION

The invention includes a technique to provide visual indication of an X-ray exposure area on a patient in an X-ray system. The technique provides change in X-ray exposure area with respect to change in collimator position, which includes IRIS, leaves, and shutter and is shown on the patient body in real time.  As a result, a doctor acquires knowledge in advance about the part of anatomy which is covered in the X-ray shot. The invention works when a generator is under a patient table and provides indication of the X-ray exposure area which is independent of the table position.

DETAILED DESCRIPTION OF THE INVENTION

The invention includes a technique to provide visual indication of an X-ray exposure area on a patient in an X-ray system. The technique provides change in X-ray exposure area with respect to change in collimator position, which includes IRIS, leaves, and shutter and is shown on the patient body in real time. 

The invention proposes four types of solutions to acquire the X-ray exposure area. The first solution includes utilizing two projectors on detector side. The second solution includes utilizing line laser or dot lasers. The third solution includes concave mirror with a stationary projector and fourth solution includes concave mirror with moving projector. 

Two projectors on the detector side includes basic concept in which cross-section of an X-ray beam is either a squircle, which is a square with circular edges, or a circle depending on shape of t...