Mobilising calculus in organ filled with liq. - vibrating organ by LF sound and forming image in real=time

摘要

The frequency and phase of the vibrations of the organ are matched to the image series or object scanning sequence of the image generating appts. (6) capable of operating in real time. The harmonic movement of the organ (8) represented by the appts. appears to come to a stand-still by virtue of the stroboscopic effect. This enables observation of the movement of the calculus (10) relative to the apparent stillness of the organ wall. The generator (7) can be positioned offset sound w.r.t. the imaging appts. (6) on the surface (9) of the body of the patient. The housing of the sound generator is lightweight with its mass balanced by two drives vibrating in opposite phase. One drive is assigned to a vibrator head and the other to a counter-mass. A single motor can be used operating via two eccentrics on its shaft. The drive can be from at least one oscillating magnet powerful by a.c. flowing through a coil. A l.f. loudspeaker can be used as the sound generator. USE/ADVANTAGE - Better and simpler targeting for store pulverisation by lithotriptor. More definite information on particle size at time of break-up.