Diagnostic apparatus for circulatory systems

A diagnostic apparatus for diagnosing the circulatory system of a patient, comprising:

• ultrasonic diagnostic means, for insertion into the circulatory system of the patient, for scanning an ultrasonic wave and obtaining an ultrasonic tomogram, the ultrasonic diagnostic means including a first X-ray impermeable portion;
• first X-ray diagnostic means for irradiating a portion of the patient's body with X-rays while said ultrasonic diagnostic means is inserted into the circulatory system of the patient, obtaining a radiograph of said portion of the patient's body including a picture image of the first X-ray impermeable portion, and detecting the location of the first X-ray impermeable portion from the radiograph;
• means for storing, when said ultrasonic diagnostic means obtains the ultrasonic tomogram, the location of said first X-ray impermeable portion and the tomogram;
• a catheter for insertion into the circulatory system of the patient, for therapy or measurement of a blood flow rate, the catheter including a second X-ray impermeable portion;
• second X-ray diagnostic means for irradiating, when said catheter is inserted into the circulatory system of the patient, X-rays onto said portion of the patient's body, obtaining a radiograph containing a picture image of the second X-ray impermeable portion, and detecting a location of the second X-ray impermeable portion from the radiograph;
• and
• means for retrieving, from said storing means, an ultrasonic tomogram obtained at a location of the first X-ray impermeable portion corresponding to the location of the second X-ray impermeable portion detected by said second X-ray diagnostic means, to thereby display the ultrasonic tomogram.