US 2026/0211150 A1Published application

Linear scanning ct imaging system and method

OwnerLi ZHANG, Zhiqiang CHEN +6inventors

InventorsLi ZHANG, Zhiqiang CHEN, Le SHEN, Tiao ZHAO, Yunda SUN, Qingping HUANG, Wuyang LIANG, Junhao LIU

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Abstract

A linear scanning CT imaging system, including: a conveying device used to move a scanned object in a predetermined conveying direction in a scanning channel; ray sources used to alternately emit ray beams to form a scanning region; detectors, including a first detector used to detect first projection data formed by the ray beams transmitted through the scanned object during a process of the scanned object passing through the scanning region, and a second detector used to detect second projection data formed by ray beams transmitted through the scanned object during the process of the scanned object passing through the scanning region; and an imaging device used to: generate a digital radiographic image of the scanned object according to second projection data, and obtain a computed tomography image of the scanned object according to first projection data and second projection data. A linear scanning CT imaging method is further provided.

Claims27

Dependent claims

A linear scanning CT imaging system, comprising:

a conveying device configured to move a scanned object in a predetermined conveying direction in a scanning channel, wherein the conveying device comprises a conveying surface for placing the scanned object;
m ray sources configured to alternately emit ray beams to form a scanning region, wherein the m ray sources are located on a side of the scanning channel, and m is a positive integer greater than or equal to 2;
and
n detectors configured to detect projection data formed by the ray beams transmitted through the scanned object during a process of the scanned object passing through the scanning region, wherein the n detectors are located on the other side of the scanning channel and are sequentially arranged at intervals in the conveying direction, and n is a positive integer greater than or equal to 3,
wherein the n detectors comprise n1 first detectors and n2 second detectors, n1 is a positive integer greater than or equal to 2, and n2 is a positive integer greater than or equal to 1;
the n1 first detectors are configured to detect first projection data formed by the ray beams transmitted through the scanned object during the process of the scanned object passing through the scanning region;
the n2 second detectors are configured to detect second projection data formed by the ray beams transmitted through the scanned object during the process of the scanned object passing through the scanning region;
and
wherein the system further comprises an imaging device configured to:
generate a digital radiographic image of the scanned object according to the second projection data;
and generate a computed tomography image of the scanned object according to the first projection data and the second projection data.

8 more elements

A linear scanning CT imaging method, comprising:

moving a scanned object in a predetermined conveying direction in a scanning channel by means of a conveying device, wherein the conveying device comprises a conveying surface for placing the scanned object;
alternately emitting ray beams from m ray sources to form a scanning region, wherein the m ray sources are located on a side of the scanning channel, and m is a positive integer greater than or equal to 2;
moving the scanned object to pass through the scanning region;
detecting projection data formed by the ray beams transmitted through the scanned object by means of n detectors during a process of the scanned object passing through the scanning region, wherein the n detectors are located on the other side of the scanning channel and are sequentially arranged at intervals in the conveying direction, and n is a positive integer greater than or equal to 3,
wherein the n detectors comprise n1 first detectors and n2 second detectors, n1 is a positive integer greater than or equal to 2, and n2 is a positive integer greater than or equal to 1;
wherein the detecting projection data formed by the ray beams transmitted through the scanned object by means of n detectors comprises:
detecting first projection data formed by the ray beams transmitted through the scanned object by means of the n1 first detectors;
and detecting second projection data formed by the ray beams transmitted through the scanned object by means of the n2 second detectors;
and
wherein the method further comprises:
generating a digital radiographic image of the scanned object according to the second projection data;
and generating a computed tomography image of the scanned object according to the first projection data and the second projection data.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/144,368Filed 23 Oct 2024
Priority: CN 202311490080.99 Nov 2023
Published: 23 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01V 5/226
Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays: using tomography
G01V 5/00
Prospecting or detecting by the use of ionising radiation
G01V 5/22
Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects: active interrogation, i.e. by…
G01V 5/224
Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays: multiple energy…