公开(公告)号：US20210280297A1

公开(公告)日：2021-09-09

申请号：US17049605

申请日：2019-04-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Sascha KRUEGER ,  Julien SENEGAS ,  Peter KOKEN

IPC: G16H30/20 ,  G16H30/40 ,  G06T7/00 ,  G06T7/73

Abstract: The invention provides for a medical instrument (100, 600) that comprises a medical imaging system (102, 102′), a subject support (110), and a camera system (104) configured for imaging the subject support in an initial position. The execution the machine executable instructions causes a processor (108) to: place (500) the subject support in the initial position (116); control (502) the camera system to acquire a series of repeated images (142); detect (506) the placement of one or more background objects (200); detect (508) one or more foreground objects (704); construct (510) a background object surface image (202) at least partially by stitching together the series of repeated images to replace image regions containing background objects obscured by the one or more foreground objects; determine (512) a three-dimensional object surface (208) using the background object surface image; detect (514) the subject in one of the series of repeated images (312); calculate (516) a subject segmentation (304) of the subject in the one of the series of repeated images; determine (518) a visible subject surface (308) using the subject segmentation and the one of the series of repeated images; and calculate (520) a three-dimensional subject model (310) by estimating a volume (314) defined by the three-dimensional object surface and the visible subject surface.

公开(公告)号：US20190033413A1

公开(公告)日：2019-01-31

申请号：US16072940

申请日：2017-02-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Erik AMTHOR ,  Peter KOKEN ,  Karsten SOMMER ,  Mariya Ivanova DONEVA ,  Peter BOERNERT

IPC: G01R33/56 ,  G01R33/46 ,  G01R33/48 ,  G01R33/561

Abstract: The invention provides for a magnetic resonance imaging system (100) for acquiring magnetic resonance data (142) from a subject (118) within a measurement zone (108), wherein the magnetic resonance imaging system comprises: a processor (130) for controlling the magnetic resonance imaging system and a memory (136) for storing machine executable instructions (150, 152, 154) and pulse sequence commands (140). The pulse sequence commands for controlling the magnetic resonance imaging system to acquire the magnetic resonance data according to a magnetic resonance fingerprinting protocol. The pulse sequence commands are configured for controlling the magnetic resonance imaging system to generate an RF pulse train (300). The pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire the magnetic resonance data as multiple k-space traces. The pulse sequence commands are configured for controlling the RF pulse train to be repeated for the acquisition of each of the multiple k-space traces. The machine executable instructions causes the processor to: sequentially acquire (200) the multiple k-space traces of magnetic resonance data by controlling the magnetic resonance imaging system with pulse sequence commands and calculate (202) the abundance of each of a set of predetermined substances for k-space traces that are acquired after a predetermined number of k-space traces of the multiple k-space traces has been acquired. The abundance of each of a set of predetermined substances is determined by comparing the magnetic resonance data with a steady state magnetic resonance fingerprinting dictionary (144). The steady state magnetic resonance fingerprinting dictionary contains a listing of calculated magnetic resonance signals in response to the RF pulse train for a set of predetermined substances.