US 6,412,978 B1Granted

X-ray diagnostic apparatus

AssigneeKabushiki Kaisha Toshiba

InventorsNaoto Watanabe, Satoru Oishi

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Abstract

An X-ray diagnostic apparatus includes an X-ray tube for irradiating a subject with X-rays, a rectangular planar type X-ray detector formed by arraying a plurality of solid-state detection elements, a supporting mechanism for supporting the X-ray tube and the planar type X-ray detector in arbitrary postures with respect to the subject, and a suspending mechanism for suspending the planar type X-ray detector from the supporting mechanism. The suspending mechanism has a rotating mechanism for rotating the planar type X-ray detector through an arbitrary angle about a central path of the X-rays. When necessary, the planar type X-ray detector is rotated about the central path of the X-rays so as to be very close to the subject. When necessary, the planar type X-ray detector is rotated, so that the longitudinal direction of the subject on the image and the vertical direction of the screen can coincide with each other.

Claims18

Dependent claims

An X-ray diagnostic apparatus comprising:

an X-ray tube configured to irradiate a subject with X-rays;
a rectangular planar type X-ray detector formed by arraying a plurality of solid-state detection elements;
a supporting mechanism configured to support said X-ray tube and said planar type X-ray detector in arbitrary postures with respect to the subject;
a suspending mechanism configured to suspend said planar type X-ray detector from said supporting mechanism, said suspending mechanism including a rotating mechanism for rotating said planar type X-ray detector through an arbitrary angle about a central path of the X-rays, said rotating mechanism including an actuator configured to drive said planar type X-ray detector to rotate;
a posture detector configured to detect postures of said X-ray tube and said planar type X-ray detector with respect to the subject;
and
a controller configured to control said actuator such that a corner of said planar type X-ray detector does not abut against the subject, thereby rotating said planar type X-ray detector through an angle corresponding to the detected posture.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/476,082Filed 3 Jan 2000
Priority: JP 11-00442311 Jan 1999
Granted: 2 Jul 2002
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61B 6/4441
The source unit and the detector unit being coupled by a rigid structure: the rigid structure being a C-arm or U-arm
A61B 6/105
Protection against mechanical damage, e.g. anti-collision devices: braking or locking devices
A61B 6/4233
Characterised by using a particular type of detector: using matrix detectors
A61B 6/587
Testing, adjusting or calibrating thereof: alignment of source unit to detector unit