Abstract: A method of treating pancreatic cancer includes: inserting a device into a stomach or a duodenum; securing at least a portion of the device in position relative to the stomach or the duodenum; and delivering ultrasonic energy from the device to treat a target site in a pancreas.

Abstract: A method of treating pancreatic cancer includes: inserting a device into a stomach or a duodenum; securing at least a portion of the device in position relative to the stomach or the duodenum; and delivering ultrasonic energy from the device to treat a target site in a pancreas.

Abstract: Renal extraction fraction (EF) is determined through use of computed tomography (CT) measurements of arterial blood before and after injection of a radiographic contrast agent into the blood and CT measurements of renal vein blood after injection of the radiographic contrast agent.

Abstract: A snow ski or snowboard includes an edge arrangement to facilitate turns on snow. Slots can be formed in the body portion which provide blades and additional edges for engaging snow during a turn with each slot facilitating the flow of snow during a turn. Alternatively, attachments to the body portion can provide the additional blades and edges in parallel with edges of the body portion. Greater control and slowing action is provided during a turn maneuver.

Abstract: Renal extraction fraction (EF) is determined through use of computed tomography (CT) measurements of arterial blood before and after injection of a radiographic contrast agent into the blood and CT measurements of renal vein blood after injection of the radiographic contrast agent.

Abstract: A dual drive bicycle includes an arm powered drive assembly including a drive mechanism mountable on one of the bicycle wheels or on the foot powered crank mechanism. The drive assembly includes a sprocket and a ratchet assembly for pivotal engagement with the sprocket wheel, a drive line coupled to the ratchet assembly for driving the ratchet assembly and the drive sprocket, and a free wheeling mechanism for coupling the ratchet assembly and the drive sprocket wheel. Movement of the handlebar moves the drive line which engages the ratchet assembly for driving the drive mechanism.

Abstract: Diseased tissue such as cirrhotic liver is differentiated from normal tissue by applying an ultrasound wave to the tissue, receiving backscattered ultrasound waves therefrom and bandpass filtering electrical signals generated from the backscattered wave. Assuming that the ultrasound wave has a spectrum and a center frequency, the bandpass is narrow relative to the spectrum and centered within the bounds of the spectrum of the ultrasound wave. The filtered signal will have an amplitude distribution for diseased tissue which is different from the amplitude distribution of normal tissue.