Registration of lung nodules using a semi-rigid model: method and preliminary results.
Registration of lung nodules using a semi-rigid model: method and preliminary results.
复制标题
使用半刚性模型登记肺结节:方法和初步结果。
DOI:
10.1118/1.2432073
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发表时间:
2007
期刊:
影响因子:
3.8
通讯作者:
Napel,Sandy
中科院分区:
文献类型:
--
作者:
Sun,Shaohua;Rubin,GeoffreyD;Paik,David;Steiner,RobertM;Zhuge,Feng;Napel,Sandy
The tracking of lung nodules across computed tomography (CT) scans acquired at different times for the same patient is helpful for the determination of malignancy. We are developing a nodule registration system to facilitate this process. We propose to use a semi‐rigid method that considers principal structures surrounding the nodule and allows relative movements among the structures. The proposed similarity metric, which evaluates both the image correlation and the degree of elastic deformation amongst the structures, is maximized by a two‐layered optimization method, employing a simulated annealing framework. We tested our method by simulating five cases that represent physiological deformation as well as different nodule shape/size changes with time. Each case is made up of a source and target scan, where the source scan consists of a nodule‐free patient CT volume into which we inserted ten simulated lung nodules, and the target scan is the result of applying a known, physiologically based nonrigid transformation to the nodule‐free source scan, into which we inserted modified versions of the corresponding nodules at the same, known locations. Five different modification strategies were used, one for each of the five cases: (1) nodules maintain size and shape, (2) nodules disappear, (3) nodules shrink uniformly by a factor of 2, (4) nodules grow uniformly by a factor of 2, and (5) nodules grow nonuniformly. We also matched 97 real nodules in pairs of scans (acquired at different times) from 12 patients and compared our registration to a radiologist's visual determination. In the simulation experiments, the mean absolute registration errors were (s.d.), (s.d.), (s.d.), (s.d.), and (s.d.) for the five cases, respectively. For the 97 nodule pairs in 12 patient scans, the mean absolute registration error was (s.d.).
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影响因子:
19.7
作者:
Karadi,C;Beaulieu,CF;JeffreyJr,RB;Paik,DS;Napel,S
通讯作者:
Napel,S
影响因子:
19.7
作者:
Yankelevitz, DF;Gupta, R;Henschke, CI
通讯作者:
Henschke, CI
影响因子:
10.6
作者:
Guofang Xiao;M. Brady;J. Noble;M. Burcher;R. English
通讯作者:
R. English
影响因子:
10.6
作者:
M. Gürcan;R. Hardie;S. Rogers;D. Dozer;B. Allen;R. Burns;J. Hoffmeister
通讯作者:
J. Hoffmeister
DOI:
10.1007/bfb0056296
发表时间:
1998-01-01
期刊:
MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION - MICCAI'98
影响因子:
--
作者:
Hata, N;Dohi, T;Jolesz, FA
通讯作者:
Jolesz, FA