MAGNETIC RESONANCE IMAGING OF BONE TISSUE

摘要

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.

主权项

1. A medical apparatus comprising:
a magnetic resonance imaging system which acquires 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, wherein the magnetic resonance data acquired using the pulse sequence comprises free induction decay data and multiple gradient echo data, wherein 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; andreconstruct 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, construct a medullary bone image from the water-saturated image; construct a cortical bone image by subtracting the in-phase image from the ultra-short echo time image;
construct a complete bone image by adding the medullary bone image to the cortical bone image; andcalculate a spatially dependent radiation attenuation coefficient using anatomical information retrieved from the complete bone image, the fat-saturated image, the in-phase image, and the ultra-short echo time image.