Magnetic resonance imaging apparatus and control program therefor

A non-transitory compute readable medium storing a program for controlling an operation of a magnetic resonance imaging apparatus including an imaging unit that images a predetermined examination part of a subject according to imaging conditions stored in a storage device that stores imaging conditions for each examination part, the program causing a computer to execute:

• a step of causing the imaging unit to acquire a pre-scan image for measuring an extent of an examination part of the subject;
• a step of calculating the extent of the examination part for an axial surface of the subject and a surface perpendicular to the axial surface using measurement data obtained by the pre-scan;
• and
• a step of calculating imaging conditions when the imaging unit images the examination part using the calculated extent of the examination part,
• wherein the pre-scan image is an axial cross section of the subject,
• wherein the calculation unit creates a mask image of the examination part from the measurement data obtained by the pre-scan, and calculates the extent of the examination part from the mask image,
• wherein the mask image is created by:
• binarizing the cross section image based on a brightness signal strength of the cross section image, and
• removing artifacts from the binarized image by a morphology transformation that repeatedly alternates a dilation processing and an erosion processing.