Method and System for Video Patient Positioning Aid
Publication Date: 2008-Dec-19
The IP.com Prior Art Database
A method for positioning and aligning a patient is presented. The method includes incorporating a video device and/or a camera device in an imaging system, where the video and/or camera device may be configured to visually identify the receptor, a field of view and ion chambers. Further, the method includes using this information to supplement the x-ray field light already available.
 The invention relates generally to imaging systems, and more particularly to an aid configured to facilitate positioning of patients during an imaging session.
 Diagnostic imaging has emerged into an essential aspect of patient care. Medical images that are obtained during a diagnostic imaging session have evolved as tools that allow a clinician non-invasive means to view anatomical cross-sections of internal organs, tissues, bones and other anatomical regions of a patient. More particularly, the medical images serve the clinician in diagnosis of disease states, determination of suitable treatment options and/or monitoring the effects of treatment. As will be appreciated, medical images may be obtained from a broad spectrum of imaging modalities, such as, but not limited to computed tomography (CT) imaging, ultrasound imaging, magnetic resonance (MR) imaging, digital mammography, X-ray imaging, nuclear medicine imaging, or positron emission tomography (PET) imaging.
 As will be appreciated, as part of the setup for a radiographic exam, a radiographic technologist typically positions the x-ray tube relative to the x-ray receptor in such a way to properly orient the x-ray beam on a patient. The x-ray beam may strike the receptor perpendicularly. However, the x-ray beam may also strike the receptor at an oblique angle. To aid in this positioning, the technologist may utilize a locating field light. This light represents the location of the x-ray field and is generally required to be coincident with the location of the x-ray field within a certain tolerance of the Source to Image Distance (SID). Once a patient has been positioned, the technologist may commence the x-ray exposure from a control room, which is separate from the patient room. Unfortunately, one of the difficulties of using the light field for positioning the patient is that discerning the location of this field may be difficult because of ambient light, thereby resulting in a sub-optimal positioning of the patient. Additionally, once the patient is seemingly properly positioned, the patient may move out of position by the time the operator goes to the control room to take the exposure. The result of a sub-optimally positioned patient is that the exposure will likely need to be retaken. This negatively impacts patient throughput and patient dose.
 Using currently available techniques, patient positioning and alignment have historically been addressed by training, field location lights and dim rooms. Nothing similar to this disclosure has been proposed.
 It may therefore be desirable to develop a robust technique and system for enabling optimal positioning and alignment of a patient during an imaging session that advantageously facilitates substantially...