Method for segmenting and denoising lung parenchyma through lateral scanning and four-corner rotary scanning

• Main Authors: LIAO XIAOLEI, LYU LIZHI, QIANG YAN, JI GUOHUA, HU YANGYANG, ZHAO JUANJUAN
• Format: Patent
• Language: English
• Published: 07.01.2015
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention discloses a method for segmenting and denoising the lung parenchyma through lateral scanning and four-corner rotary scanning. The method includes the steps that firstly, a minimum enclosing rectangle of an ROI lung region of the thoracic cavity is extracted; the minimum enclosing rectangle belonging to which portion of each lung is judged, lateral scanning or four-corner rotary scanning is selected according to the portion to which the minimum enclosing rectangle belongs, seed points are acquired, only lateral scanning is adopted in the upper portion of each lung, either lateral scanning or four-corner rotary scanning is adopted in the middle of each lung, and only four-corner rotary scanning is adopted in the bottom of each lung; eventually, residual trachea noise, main bronchus noise and other noise are removed according to an eight-neighborhood region growing method. The method is simple and easy to achieve, the segmentation speed is very high, for each image in a CT image sequence, a lung region of each image in a PET-CT image sequence can be completely, automatically and accurately segmented according to the method combining an iteration threshold value and morphology.