Abstract: An automatic aligning mechanism is used for a nuclear magnetic resonance imaging apparatus, the imaging apparatus producing an image of a section of an inspected portion of a subject at a predetermined inspecting position in a central space of a main coil supported by a gantry, by means of the principles of nuclear magnetic resonance.

Abstract: A magnetic resonance imaging system is made up of a static field generator, a gradient field generator, an excitation pulse generator, a receiver, a controller for controlling the static field generator, gradient field generator, excitation pulse generator, and receiver, and an image processor. The controller includes a multi-slice control section and an adjustment/control section. The multi-slice controller sequentially controls use excitation of a plurality of slices by a plurality of excitation pulses of different carrier frequencies in a common static field and a gradient field. Through these excitations, the magnetic resonance data for the plurality of slices is obtained with one excitation repetition period, and the multi-slice imaging can be performed by a predetermined number of repetitive excitations.

Abstract: An emission type computed tomography apparatus comprises a mechanism for rotating a detector along a circle centered at a human body to whom radioisotope is previously given, and a circuit for reconstructing a tomogram in accordance with an output signal from said detector. The rotating mechanism further has a member for slanting the detector with respect to a tangential line of the circle, a member for slanting said detector with respect to the body axis, and a member for changing the radius of the rotating circle of the detector.

Abstract: An emission computed tomography wherein a radiation detector is rotated around a subject to detect radiation emitted from radioisotopes distributed in the subject and a distributing image of the radioisotopes in any section of the subject is reconstructed on the basis of the detected data, the emission computed tomography including detector-driving apparatus for moving the detector to or from the subject as the detector is rotated around the subject, at least one distance-measuring device, such as an ultrasonic transducer, for measuring the distance between the detector and subject at every rotative position of the detector, and apparatus responsive to the measured distance for controlling the detector-driving apparatus in order to adjust the distance between the detector and subject within a predetermined range.