Abstract: Methods and systems for heating a body tissue region adjacent a body lumen using selective accumulation of energy without knowledge of tissue topography. Methods include positioning an energy delivery portion of a catheter within the lumen adjacent the body tissue region, determining a pulse characteristic in response to a thermal property of a first tissue type and applying pulsed energy with the characteristic to treat a second tissue type within the region by drawing heat from the first tissue at a rate that inhibits thermal damage to the first tissue while building-up heat in the second tissue. Systems include a catheter body having an energy delivery portion processor configured to control a pulse characteristic of pulsed energy to therapeutically treat the second tissue by drawing heat from the first tissue at a rate that inhibits thermal damage to the first tissue while building-up heat in the second tissue.

Abstract: A non-invasive measurement system (110) for measuring the electrical potential of a voltage source (20, 120) includes a sensing electrode (50, 151) spaced from the voltage source (20, 120). Preferably the voltage source (20, 120) is within a biological cell (115) located in a nutrient bath (119) including electrolytic medium (117) and an object (30, 190) is a portion of the electrolytic fluid (117) located between the cell (115) and the sensing electrode (50, 151). A feedback electrode (181) is formed in an annular shape and surrounds the sensing electrode (50, 151) thus creating an annular fluid region therebetween. The value of the voltage in the annular region (131) is set substantially equal to the value of the voltage in the object (190) and therefore the impedance between the object (190) and a stray voltage source (40) is maximized.

Abstract: Methods and systems for heating a body tissue region adjacent a body lumen with diseased and healthy portions using selective accumulation of energy in the artery tissue with or without knowledge of tissue topography. The method includes positioning an energy delivery portion of a catheter body within the lumen adjacent the body tissue region to be heated, determining a pulse characteristic in response to a thermal property of a first tissue type and applying pulsed energy with the pulse characteristic from the energy delivery portion so as to therapeutically treat the second tissue type within the body tissue region by drawing heat from the first tissue type at a rate that avoids significant thermal damage to the first tissue type while building-up heat in the second tissue type.

Abstract: A wearable ballistic impact protection system detects impacts to a body. The system includes multiple sensors for detecting vibration. The sensed vibrations are converted to electrical signals which are filtered. Electronic components are provided to determine whether the filtered signal have frequency and amplitude characteristics of impact that cause injury to a body. Preferably, the sensors are Piezo-electric film sensing elements. Information regarding the extent of the impact and injuries to the body may be transmitted to a remote location so that medics or other personnel may be informed to the extent of injuries to the body so that they may provide medical assistance.

Abstract: The invention generally pertains to reducing artifact noise signals present when non-invasive capacitive-type signal measurements are taken of static electric fields produced by an object of interest. According to a first preferred embodiment of the invention, a given static artifact signal is reduced by minimizing the potential difference between a ground point of sensor circuitry and the potential of the object. According to a second preferred embodiment of the invention, the change in signal due to motion of the sensor in the field produced by the object is minimized by reducing the impact of changes in coupling to the signal source.

Abstract: A wearable ballistic impact protection system detects impacts to a body. The system includes multiple sensors 10L, 10R for detecting vibration. The sensed vibrations are converted to electrical signals which are filtered. Electronic components 15 are provided to determine whether the filtered signal have frequency and amplitude characteristics of impact that cause injury to a body. Preferably, the sensors 10L, 10R are Piezo-electric film sensing elements. Information regarding the extent of the impact and injuries to the body may be transmitted to a remote location so that medics or other personnel may be informed to the extent of injuries to the body so that they may provide medical assistance.

Abstract: The invention generally pertains to reducing artifact noise signals present when non-invasive capacitive-type signal measurements are taken of static electric fields produced by an object (10) of interest. According to a first preferred embodiment of the invention, a given static artifact signal is reduced by minimizing the potential difference between a ground point (G1) of sensor circuitry and the potential of the object (10). According to a second preferred embodiment of the invention, the change in signal due to motion of the sensor (30, 40; 30?, 40?; 230; 330; 430; 530; 630) in the field produced by the object (10) is minimized by reducing the impact of changes in coupling to the signal source.