Scanning method and device with reduced scanning dosage
AssigneeShenyang Neusoft Medical Systems Co., Ltd.
InventorsXinliang Li, Ling Pang, Shanshan Lou
Life of this patent
Estimating the term…
Abstract
A scanning method and device are provided. The method includes: determining values for a first scanning dosage and a second scanning dosage used in a scanning process based on a trigger condition which varies regularly and attenuation fluctuations of an object to be scanned, wherein the first scanning dosage is higher than the second scanning dosage, and at least one of the first scanning dosage and the second scanning dosage has an inconstant value; and scanning a target position with the determined values. In the present disclosure, a scanning dosage may be reduced and different image noises may be kept consistent.
Claims18
A computed tomography (CT) scanning method, comprising:
- determining values for a first scanning dosage and a second scanning dosage used in a scanning process based on a trigger condition which varies regularly and attenuation fluctuations of an object to be scanned, wherein the first scanning dosage is higher than the second scanning dosage, and at least one of the first scanning dosage and the second scanning dosage has an inconstant value;
- scanning a target position with dosages at the determined values;
- during a transition process from the first scanning dosage stage to the second scanning dosage stage, implementing real-time calculation to obtain a time period for transition from a current scanning dosage to an initial scanning dosage in a third scanning dosage stage performed after the second scanning dosage stage;
- implementing real-time comparison between the calculated time period and a preset time period;
- and
- if the calculated time period is longer than or equal to the preset time period, terminating the transition process from the first scanning dosage stage to the second scanning dosage stage, terminating the second scanning dosage stage, and transitioning to the third scanning dosage stage from a current time point.
A computed tomography (CT) scanning device, comprising:
- a scanning dosage determination unit, adapted to determine values for a first scanning dosage and a second scanning dosage used in a scanning process based on a trigger condition which varies regularly and attenuation fluctuations of an object to be scanned, wherein the first scanning dosage is higher than the second scanning dosage, and at least one of the first scanning dosage and the second scanning dosage has an inconstant value;
- a CT scanning unit, adapted to scan a target position with dosages at the determined values;
- a real-time calculation unit, adapted to implement real-time calculation to obtain a time period for transition from a current scanning dosage to an initial scanning dosage in a third scanning dosage stage performed after the second scanning dosage stage, during a transition process from the first scanning dosage stage to the second scanning dosage stage;
- a real-time comparison unit, adapted to implement real-time comparison between the calculated time period and a preset time period;
- and
- a transition unit, adapted to terminate the transition process from the first scanning dosage stage to the second scanning dosage stage, terminate the second scanning dosage stage, and transition to the third scanning dosage stage from a current time point, if the calculated time period is longer than or equal to the preset time period.
Dependencies are inferred from the claim text.