Osteoporosis progress stage measuring device and osteoporosis progress stage measuring method

An osteoporosis progress stage measuring device, comprising:

• an oscillating unit oscillating an ultrasonic wave that gives torsional vibration to a bone part of a subject and an ultrasonic wave that gives vertical vibration to the bone part;
• a detecting unit detecting, through the subject, an ultrasonic wave attributed to the torsional vibration propagated through the bone part and an ultrasonic wave attributed to the vertical vibration propagated through the bone part;
• a sound speed calculating unit calculating a sound speed of the ultrasonic wave attributed to the torsional vibration based on the ultrasonic wave attributed to the torsional vibration detected by said detecting unit, and a sound speed of the ultrasonic wave attributed to the vertical vibration based on the ultrasonic wave attributed to the vertical vibration detected by said detecting unit;
• and
• an osteoporosis progress stage characteristic calculating unit calculating a characteristic indicating the progress stage of osteoporosis in the bone part by dividing the sound speed of the ultrasonic wave attributed to the torsional vibration by the sound speed of the ultrasonic wave attributed to the vertical vibration calculated by said sound speed calculating unit.

An osteoporosis progress stage measuring device, comprising:

• an oscillating unit oscillating an ultrasonic wave that gives torsional vibration to a bone part of a subject and an ultrasonic wave that gives vertical vibration to the bone part;
• a detecting unit detecting, through the subject, an ultrasonic wave attributed to the torsional vibration propagated through the bone part and an ultrasonic wave attributed to the vertical vibration propagated through the bone part;
• a sound speed calculating unit calculating a sound speed of the ultrasonic wave attributed to the torsional vibration based on the ultrasonic wave attributed to the torsional vibration detected by said detecting unit, and a sound speed of the ultrasonic wave attributed to the vertical vibration based on the ultrasonic wave attributed to the vertical vibration detected by said detecting unit;
• and
• an osteoporosis progress stage characteristic calculating unit calculating a characteristic indicating the progress stage of osteoporosis in the bone part by determining a Poisson's ratio using the sound speed of the ultrasonic wave attributed to the torsional vibration and the sound speed of the ultrasonic wave attributed to the vertical vibration calculated by said sound speed calculating unit.

An osteoporosis progress stage measuring device, comprising:

• an oscillating unit oscillating an ultrasonic wave that gives torsional vibration to a bone part of a subject;
• a detecting unit detecting, through the subject, an ultrasonic wave attributed to the torsional vibration propagated through the bone part;
• an attenuation coefficient calculating unit calculating an attenuation coefficient of the ultrasonic wave attributed to the torsional vibration detected by said detecting unit with respect to the ultrasonic wave oscillated by said oscillating unit;
• and
• an osteoporosis progress stage characteristic calculating unit calculating, based on the attenuation coefficient calculated by said attenuation coefficient calculating unit, a characteristic indicating the progress stage of osteoporosis in the bone part.

An osteoporosis progress stage measuring method, comprising:

• an oscillating step of oscillating an ultrasonic wave that gives torsional vibration to a bone part of a subject and an ultrasonic wave that gives vertical vibration to the bone part;
• a detecting step of detecting, through the subject, an ultrasonic wave attributed to the torsional vibration propagated through the bone part and an ultrasonic wave attributed to the vertical vibration propagated through the bone part;
• a sound speed calculating step of calculating a sound speed of the ultrasonic wave attributed to the torsional vibration based on the ultrasonic wave attributed to the torsional vibration detected by said detecting step, and a sound speed of the ultrasonic wave attributed to the vertical vibration based on the ultrasonic wave attributed to the vertical vibration detected by said detecting step;
• and
• an osteoporosis progress stage characteristic calculating step of calculating a characteristic indicating the progress stage of osteoporosis in the bone part by dividing the sound speed of the ultrasonic wave attributed to the torsional vibration by the sound speed of the ultrasonic wave attributed to the vertical vibration calculated by said sound speed calculating step.

An osteoporosis progress stage measuring method, comprising:

• an oscillating step of oscillating an ultrasonic wave that gives torsional vibration to a bone part of a subject;
• a detecting step of detecting, through the subject, an ultrasonic wave attributed to the torsional vibration propagated through the bone part;
• an attenuation coefficient calculating step of calculating an attenuation coefficient of the ultrasonic wave attributed to the torsional vibration detected by said detecting step with respect to the ultrasonic wave oscillated by said oscillating step;
• and
• an osteoporosis progress stage characteristic calculating step of calculating, based on the attenuation coefficient calculated by said attenuation coefficient calculating step, a characteristic indicating the progress stage of osteoporosis in the bone part.