A CT imaging apparatus comprising: an X-ray generator configured to emit an X-ray beam; an X-ray detector configured to detect said X-ray beam; a support that supports said X-ray generator and said X-ray detector while opposing said X-ray generator and said X-ray detector to each other; a rotation driving unit configured to rotate said support around a rotation axis line located between said X-ray generator and said X-ray detector ; a display configured to display a panoramic tomographic image (PI1) that is an image of a curved section (dm) corresponding to a dental arch of a subject (M10); a first position setting unit configured to receive an input of a designation operation to designate a position in a mesiodistal direction on said panoramic tomographic image (PI1) displayed on said display , and to set a first position (Pos1) on said curved section (dm) based on the designation operation; a fluoroscopic imaging executing unit configured to irradiate said subject (M10) with the X-ray beam along a fluoroscopic imaging direction (D1) having a component of a tangential direction (TLD1) at said first position (Pos1) on said curved section (dm) by controlling said X-ray generator , said X-ray detector , and said rotation driving unit , and to acquire a fluoroscopic image (SI1 to SI3); a second position setting unit configured to receive an input of a designation operation to designate a position in a buccolingual direction (CTD1) on said fluoroscopic image (SI1 to SI3) displayed on said display , and to set a second position (Pos2) based on the designation operation; an imaging region setting unit configured to set an imaging region (FOV) of CT imaging based on said second position (Pos2); and a CT imaging executing unit configured to irradiate said imaging region (FOV) set by said imaging region setting unit with an X-ray cone beam by controlling said X-ray generator , said X-ray detector , and said rotation driving unit , and to execute said CT imaging. an X-ray generator configured to emit an X-ray beam; an X-ray detector configured to detect said X-ray beam; a support that supports said X-ray generator and said X-ray detector while opposing said X-ray generator and said X-ray detector to each other; a rotation driving unit configured to rotate said support around a rotation axis line located between said X-ray generator and said X-ray detector ; a display configured to display a panoramic tomographic image (PI1) that is an image of a curved section (dm) corresponding to a dental arch of a subject (M10); a first position setting unit configured to receive an input of a designation operation to designate a position in a mesiodistal direction on said panoramic tomographic image (PI1) displayed on said display , and to set a first position (Pos1) on said curved section (dm) based on the designation operation; a fluoroscopic imaging executing unit configured to irradiate said subject (M10) with the X-ray beam along a fluoroscopic imaging direction (D1) having a component of a tangential direction (TLD1) at said first position (Pos1) on said curved section (dm) by controlling said X-ray generator , said X-ray detector , and said rotation driving unit , and to acquire a fluoroscopic image (SI1 to SI3); a second position setting unit configured to receive an input of a designation operation to designate a position in a buccolingual direction (CTD1) on said fluoroscopic image (SI1 to SI3) displayed on said display , and to set a second position (Pos2) based on the designation operation; an imaging region setting unit configured to set an imaging region (FOV) of CT imaging based on said second position (Pos2); and a CT imaging executing unit configured to irradiate said imaging region (FOV) set by said imaging region setting unit with an X-ray cone beam by controlling said X-ray generator , said X-ray detector , and said rotation driving unit , and to execute said CT imaging. <EOS>