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Publication Date: 2014-Apr-04

Publishing Venue

The Prior Art Database


The invention proposes a technique to a dynamically update object recognition system used in diagnostic imaging systems. The proposed technique ensures safety protocols which are to be followed during scanning and take corrective actions for proper scanning to ensure safety of patients. The technique identifies sub-system necessary for scanning and eliminates chances of damage to unconnected sub-systems, such as, magnetic resonance imaging (MRI) coils which are left accidently on the cradle before scanning. The technique analyzes sub-system location within the scanning system and with respect to patient ensuring safe scanning. The technique also analyzes patient postures with respect to the safe scanning protocols and locates potential electrically conductive loop formed in the patient posture.

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The invention generally relates to an object recognition system and more particularly to dynamic updatable object recognition system used in diagnostic imaging systems.


In general, image or object recognition is used in diagnostic imaging system, such as, computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET) CT and PET MR, among others. Object recognition is used for recognizing sub-systems necessary for scanning and patient posture scanning. The image or object recognition is also used for tracking scanning protocols which needs to be followed for safe and efficient scanning.

Thermal injuries happen to patients during scanning as a result of number of reasons which arises due to technician error or patient movement during scanning. The first reason is coil cable looping. According to safety protocols, cables of coil sub-system should not create a physical loop during scanning procedures as this creates an electrically conducting loop, thereby, increasing temperature. Second reason is cable touching the bore of the scanner resulting in increased temperature. Technicians are instructed during diagnostics scanning systems training to not to route the cable close to the bore. The third reason is when in case of a scan procedure which requires multiple coils, cables of the multiple coils crisscross each other to increase temperature near the patient anatomy. The forth reason is that the cable or cable components moves across patient anatomy. The cables run over the patient anatomy and cables heats up and potentially harm the patients. The fifth reason is loop formation in patient anatomy. Radio frequency (RF) burns happens when electrical loops are created due to skin contact which creates potential electrical loop region resulting in RF burns during scan. For example, hands of patient cross each other when they hold together or when the patient lying with their hands to the side touches their thighs or patient clenching their hands, among others. The sixth reason is that comfort pads are not used for patients. Sometimes, the technician fails to use patient pads to retain patient posture, to remove potential electrical loop region in patient posture which results in discomfort and even RF burns to patients. In subsystem identification, necessary and unwanted sub-systems are identified during scanning procedures. When multiple coils are used in certain MRI scanning procedures, there are chances that the technician forgets removing coil which is not required for scanning. Presence of such coil in an active scanning environment damages the coil. Also, in MR systems, coil identification (ID) printed circuit board (PCB) is used to recognize specific coils.

A conventional technique has an identification method and process for objects from digitally captured images. The technique uses...