942 New Patents

catheter and positioned in the small arteries of the coronary arterial tree. Pressure sensors can be. used in conjunction with other sensors (e.g. temperature, pH, or Doppler sensors) and are useful in a variety of applications (e.g. venous, urinary tract, esophageal). In one version of the assembly, the diagnostic sensor has a guidewire coupling structure comprising a pair of spaced- apart fingers and the guidewire has a constricted fitting region for shiftably receiving the coupling structure.

common beam forming data, and an amount of radiation of the ultrasonic wave to a body to be examined can be reduced. In the B mode opera- tion, transmission and reception of a sharply focusing ultrasonic beam are carried out based upon a B mode beam forming data, while in the Doppler mode, transmission and reception of a predetermined blurringly focusing ultrasonic beam are carried out based upon a beam forming data which is obtained by modifying the B mode beam forming data.

4966150

ECHO TRACKING SYSTEM FOR APPARATUS FOR ULTRASONIC

MEASUREMENT OF THE POSITION OF A MOBILE WALL

Jean-Daniel Etienne, Pierre-AndreBornoz Claude Farine, Neuchtel, Switzerland assigned to Asulab S A

An echo tracker clamps a time window for detec- ting an echo at the position of an echo produced by a mobile wall receiving an ultrasonic pulse signal at a repetition rate Fr. It includes a depth counter (28) which counts in order to define the beginning of the time window in relation to a pulse of the pulse signal and which when it reaches a given value, supplies an enabling signal to activate authorization means (30) and a posi- tion detector (32). Enabling means (30) provide an enabling signal for a given time which defines the detecting time window. During this time, the position detector counts until the echo is detec- ted. The value reached at that instant is used to clamp again the time window and to modify the initial value of the depth indicator. The inven- tion is useful in the medical field for measuring the changes of the position of an interface bet- ween two tissues.

4966151

ULTRASONIC DIAGNOSTIC A P P A R A T U S

Yasuhito Takeuchi, Tokyo, Japan assigned to Yokogawa Medical Systems Limited

In an ultrasonic diagnostic apparatus of this in- vention, the dimension of a sample volume can be adjusted both in the depth and azimuth direc- tions in forming a transmission beam for both a B mode and a Doppler mode with the use of a

4966953

LIQUID SEGMENT POLYURETHANE GEL AND

COUPLERS FOR ULTRASONIC DIAGNOSTIC PROBE

COMPRISING THE SAME

Yasuo Shikinami, Kaoru Tsuta, Masahiko Taniguchi, Hidekazu Boutani, Osaka, Japan as- signed to Takiron Co Ltd

A one-component system polyurethane gel and a coupler for ultrasonic diagnostic probes com- prising the same are disclosed. The gel is ob- tained by reacting a polyol having a room temperature liquid alkylene oxide chain and/or a polyurethane polyol prepolymer having a room temperature liquid alkylene oxide chain with a polyurethane polyisocyanate prepolymer having a room temperature liquid alkylene oxide chain. The gel causes no bleeding or evaporation of a dispersion medium and is therefore excellent in safety to the human body and preservation stability.

4971991

PHYSIOLOGICAL FUNCTION ENHANCING AGENTS

ACTIVATED BY ULTRASONIC WAVES FOR THE TREATMENT

OF TUMORS

Kohshiro Umemura, Ryuichiro Nishigaki, Nagahiko Yumita, Fujisawa, Japan assigned to Kohshiro Umemura

Physiological function-enhancing agents to be used for the treatment of tumors comprise a compound capable of stimulating the generation of at least one type of active oxygen, such as superoxide radicals and singlet oxygen, upon ul-