Drive unit, diagnostic imaging apparatus, and operation method

A diagnostic imaging apparatus comprising:

• a catheter in which is positioned an imaging core that executes tomographic imaging;
• a scanner unit to which the catheter is connected;
• a pull-back unit on which the scanner unit is movably supported for movement in a predetermined direction relative to the pull-back unit;
• a hold unit configured to control a non-hold state in which displacement of the scanner unit with respect to the pull-back unit is not restricted and a hold state in which the displacement of the scanner unit with respect to the pull-back unit is fixed by an electromagnetic locking of the scanner unit with respect to the pull-back unit;
• a driving unit configured to rotationally drive the imaging core of the catheter connected to the scanner unit;
• a switching input unit configured to receive a switching input operation identifying either the hold state or the non-hold state;
• a scan input unit configured to cause the diagnostic imaging apparatus to execute scanning;
• a pull-back input unit configured to cause the driving unit to execute pull-back;
• a control unit configured to, upon detecting the switching input operation performed on the switching input unit to change from the hold state to the non-hold state while the imaging core is not rotationally driven, rotationally drive the imaging core and then set the scanner unit to the non-hold state, and upon detecting an input operation performed on one or more of the scan input unit and the pull-back input unit in the hold state, displace or move the scanner unit with respect to the pull-back unit;
• and
• an image processing device configured to generate a tomographic image based on a signal acquired by the imaging core executing the tomographic imaging.