Abstract: Disclosed is a medical system (100, 500) that comprises a radiotherapy system (102) configured for controllably irradiating a target volume (114) within an irradiation zone (112); a subject support (120) configured for supporting at least a ventral region (124) of a subject (122) within the irradiation zone; a breath monitor system (132, 132?) configured for providing a motion signal (154, 158) descriptive of subject breathing motion; and a subject display (130, 130?) configured for displaying a breathing phase indicator (160, 160?) to the subject when supported by the subject support. Execution of the machine executable instructions (150) causes a processor (142) controlling the medical system to receive (200) a time resolved magnetic resonance imaging dataset (152) synchronized to a measured motion signal (154).

Abstract: Disclosed herein is a medical system (100, 300, 500) comprising a processor (104) configured for controlling the medical system and a memory (110) for storing machine executable instructions. Execution of the instructions causes the processor to receive (200) four-dimensional Dixon magnetic resonance image data (122). The four-dimensional Dixon magnetic resonance imaging data is T1 weighted. The four-dimensional Dixon magnetic resonance image data is synchronized to a respiratory signal (124). Execution of the instructions further causes the processor to reconstruct (202) synthetic four-dimensional computed tomographic image data (12) from the four-dimensional Dixon magnetic resonance imaging data. The four-dimensional Dixon magnetic resonance imaging data is synchronized to the respiratory signal.

Abstract: It is an object of the invention to improve quality assurance when using MRI images for radiotherapy treatment planning. This object is achieved by a treatment plan evaluation tool A configured for calculating a quality indicator for a radiotherapy treatment plan. The radiotherapy treatment plan originates from a planning image, wherein the planning image is an MRI image acquired under a presence of a main magnetic field having a magnetic field inhomogeneity. The treatment plan evaluation tool is further configured to receive information about the magnetic field inhomogeneity and the treatment plan evaluation tool is further configured to calculate the quality indicator based on the information about the magnetic field homogeneity.

Abstract: A magnetic resonance imaging system is configured to be selectively operated in a default mode and an emulation mode. Execution of machine executable instructions by a processor of the magnetic resonance imaging system causes the magnetic resonance imaging system to receive a selection signal selecting the emulation mode. The magnetic resonance imaging system switches from the default mode to the emulation mode. The magnetic resonance imaging system is operated in the emulation mode using the set of emulation control parameters. The emulated magnetic resonance imaging data is acquired from the imaging zone of the magnetic resonance imaging system.

Abstract: The invention relates to a magnetic resonance imaging system (100). The magnetic resonance imaging system (100) is configured to be selectively operated in a default mode and an emulation mode. Execution of machine executable instructions (290) by a processor (203) of the magnetic resonance imaging system (100) causes the magnetic resonance imaging system (100) to receive a selection signal selecting the emulation mode. The magnetic resonance imaging system (100) switches from the default mode to the emulation mode. The magnetic resonance imaging system (100) is operated in the emulation mode using the set of emulation control parameters (292). The emulated magnetic resonance imaging data (270) is acquired from the imaging zone (108) of the magnetic resonance imaging system (100).

Abstract: It is an object of the invention to improve quality assurance when using MRI images for radiotherapy treatment planning. This object is achieved by a treatment plan evaluation tool A configured for calculating a quality indicator for a radiotherapy treatment plan. The radiotherapy treatment plan originates from a planning image, wherein the planning image is an MRI image acquired under a presence of a main magnetic field having a magnetic field inhomogeneity. The treatment plan evaluation tool is further configured to receive information about the magnetic field inhomogeneity and the treatment plan evaluation tool is further configured to calculate the quality indicator based on the information about the magnetic field homogeneity.

Abstract: A medical apparatus includes a magnetic resonance imaging system for acquiring magnetic resonance data from an imaging volume, a processor for controlling the medical apparatus, and a memory containing machine executable instructions and a pulse sequence. The magnetic resonance data acquired using the pulse sequence comprises free induction decay data and multiple gradient echo data. Execution of the instructions causes the processor to acquire the magnetic resonance data using the magnetic resonance imaging system in accordance with the pulse sequence, and reconstruct an in-phase image, a fat-saturated image, a water-saturated image, and an ultra-short echo time image from the magnetic resonance data, wherein the ultra-short echo time image comprises bone image data.

Abstract: A medical apparatus includes a magnetic resonance imaging system for acquiring magnetic resonance data from an imaging volume, a processor for controlling the medical apparatus, and a memory containing machine executable instructions and a pulse sequence. The magnetic resonance data acquired using the pulse sequence comprises free induction decay data and multiple gradient echo data. Execution of the instructions causes the processor to acquire the magnetic resonance data using the magnetic resonance imaging system in accordance with the pulse sequence, and reconstruct an in-phase image, a fat-saturated image, a water-saturated image, and an ultra-short echo time image from the magnetic resonance data, wherein the ultra-short echo time image comprises bone image data.