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"X-Ray Diagnosis Apparatus and a Dose Management Method" in Patent Application Approval Process

June 17, 2014



By a News Reporter-Staff News Editor at Information Technology Newsweekly -- A patent application by the inventors Sato, Naotaka (Otawara-shi, JP); Abe, Shingo (Nasushiobara-shi, JP); Ikawa, Katsuie (Nasushiobara-shi, JP); Ozawa, Masahiro (Sakura-shi, JP); Kanno, Yusuke (Otawara-shi, JP); Sakakibara, Jun (Otawara-shi, JP); Yamashita, Satoshi (Utsunomiya-shi, JP); Watanabe, Yuichiro (Yaita-shi, JP), filed on October 2, 2012, was made available online on June 5, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Toshiba Medical Systems Corporation.

The following quote was obtained by the news editors from the background information supplied by the inventors: "The X-ray diagnosis apparatus irradiates X-rays from an X-ray tube onto a patient, captures the X-rays transmitted through the subject using an X-ray detector, and the like, and generates a fluoroscopic image or a captured image, which is a shadowgram proportionate to the transit dose thereof. Subsequently, operators, including doctors, laboratory personnel, and the like (hereinafter, simply referred to as 'operator') observe the fluoroscopic image or captured image generated by the X-ray diagnosis apparatus, thereby diagnosing the subject.

"Managing the dose irradiated onto the subject becomes very important upon diagnosis using the X-ray diagnosis apparatus above. This is because when the entrance dose is high, there is a danger of irradiation damage being caused to the body tissue.

"Meanwhile, there is a case such that the intensity distribution of the X-rays being irradiated from the X-ray tube varies depending on the configuration of the X-ray diagnosis apparatus and conditions upon photographing. For example, there is a case such that when electron beams collide with an anode within the X-ray tube and X-rays are generated, the intensity distribution of the generated X-rays becomes varied due to a heel effect. Moreover, there is a case such that, depending on the collimator and conditions of the filter, the intensity of the X-ray transmitting a part of the irradiation field decreases. Furthermore, when a top is interposed between the X-ray tube and the subject, some X-rays are absorbed by the top at a part where the top is interposed, causing the intensity of the X-rays of the part to decrease."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "Problems to be Solved by the Invention

"The problem to be solved by the present invention is to allow management of the entrance dose for each specified domain within an irradiation field even under circumstances when variance is generated in the intensity distribution of X-rays within the irradiation field.

"Means of Solving the Problems

"In order to achieve the abovementioned purpose, a first embodiment 1 of the present embodiment is an X-ray diagnosis apparatus that detects X-rays output from a X-ray source and transmitted through a subject and generates images of the inside of the subject, and comprises a detector, an X-ray intensity distribution data generator, and an entrance dose distribution data generator. The detector detects the intensity of the X-rays output from the X-ray source. The X-ray intensity distribution data generator generates X-ray intensity distribution data showing the X-ray intensity for each of a plurality of subdomains of an X-ray irradiation field from the X-ray source, based on the detection outcome by the detector. The entrance dose distribution data generator generates entrance dose distribution data showing the dose of X-rays, which are output from the X-ray source and irradiated onto the subject, based on the X-ray intensity distribution data.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a block diagram of an X-ray diagnosis apparatus related to the present embodiment.

"FIG. 2 illustrates an example of the distribution of the X-ray intensity within an irradiation field.

"FIG. 3A is a graph illustrating a relation between the SN ratio of the X-ray intensity and an entrance dose.

"FIG. 3B is a figure describing distribution data.

"FIG. 4A is a figure describing a relation between a top and the entrance dose.

"FIG. 4B is a figure describing a relation between a compensating filter and the entrance dose.

"FIG. 4C is a figure describing a relation between the compensating filter and the entrance dose.

"FIG. 4D is a figure describing a relation between the compensating filter and the entrance dose.

"FIG. 5A illustrates an example of a method for managing the entrance dose.

"FIG. 5B illustrates an example of the method for managing the entrance dose.

"FIG. 6A is an example of display modes of information indicating the entrance dose.

"FIG. 6B is an example of the display modes of the information indicating the entrance dose.

"FIG. 7A is a flow chart illustrating a flow of processes related to generation of the distribution data.

"FIG. 7B is a flow chart illustrating a flow of processes related to calculation of the entrance dose."

URL and more information on this patent application, see: Sato, Naotaka; Abe, Shingo; Ikawa, Katsuie; Ozawa, Masahiro; Kanno, Yusuke; Sakakibara, Jun; Yamashita, Satoshi; Watanabe, Yuichiro. X-Ray Diagnosis Apparatus and a Dose Management Method. Filed October 2, 2012 and posted June 5, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=3209&p=65&f=G&l=50&d=PG01&S1=20140529.PD.&OS=PD/20140529&RS=PD/20140529

Keywords for this news article include: Information Technology, Information and Data Generators, Toshiba Medical Systems Corporation.

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Source: Information Technology Newsweekly


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