Abstract: A catheter (700, 800, 1206) comprising: a shaft with distal (808, 906, 1004, 208) and proximal ends (1006),wherein the distal end comprises at least one array of capacitive micromachined ultrasound transducers (308, 402, 404, 500, 512, 600, 604, 802, 008) with an adjustable focus for controllably heating a target zone (806, 1014, 1210); and a connector (1012) at the proximal end for supplying the at least one array of capacitive micromachined ultrasound transducers with electrical power and for controlling the adjustable focus.

Abstract: A medical apparatus (400) comprising an ultrasound transmitter (444, 602) and receiver (446, 604) system (600) for acquiring ultrasound data (476) descriptive of the speed of ultrasound (304, 306) along at least two paths (606, 1114). The medical apparatus further comprises a medical imaging system (402) for acquiring medical image data (468) and a memory (464) containing instructions (490, 492, 494, 496, 498, 500, 502, 504) that causes the processor to acquire (100, 200) the medical image data. The instructions further cause the processor to acquire (102, 202) the ultrasound data. The instructions further cause the processor to segment (104, 204) the medical image data into at least two tissue types (434, 436, 610, 612, 708, 710). The instructions further causes the processor to determine (106, 206) at least two distances corresponding to the at least two paths in the subject. The instructions further cause the processor to calculate (108, 208) the speed of ultrasound in the at least two tissue types.

Abstract: A medical apparatus (300, 400, 500, 600) comprising a magnetic resonance imaging system (301). The medical apparatus further comprises a memory (330) containing instructions (350, 352, 354, 456, 458, 460) for execution by a processor (324). Execution of the instructions cause the processor to acquire (102, 202) baseline magnetic resonance data (332) and reconstruct (104, 204) a first image (334) using the baseline magnetic resonance data. Execution of the instructions further cause the processor acquire (106, 212) undersampled magnetic resonance data (336), which is undersampled in k-space in comparison to the baseline magnetic resonance data. Execution of the instructions further cause the processor reconstruct (108, 214) a second image (338) using the undersampled magnetic resonance data and the first image. The second image is reconstructed using an image ratio constrained reconstruction algorithm (354) and to calculate (110, 216) a temperature map (340) using the second image.

Abstract: A medical imaging system (900, 1000, 1100, 1200) for acquiring medical image data (930), the medical imaging system comprising: a tissue treating system (910, 1080, 1180, 1190, 1280, 1290) for treating a target volume (908); a computer system (918) comprising a processor (922), wherein the computer system is adapted for controlling the medical imaging system; and a memory (928) containing machine readable instructions (954, 956, 958, 962, 964, 966, 968, 970, 972, 974). Execution of the instructions cause the processor to: acquire (100, 200, 308) medical image data; reconstruct (102, 202, 310) a medical image (932) using the medical image data; receive (104, 204, 312) an image segmentation seed (600, 934) derived from a treatment plan (936), and identify (106, 210, 314) a treated volume (400, 700, 800) in the medical image by segmenting the medical image in accordance with the image segmentation seed.