Evaluation of an automated system for temporal subtraction of thin-section thoracic CT.
نویسندگان
چکیده
The purpose of this study was to objectively evaluate the registration accuracy of an automated temporal subtraction system of thin-section thoracic CT. The automated subtraction system was applied to data from 20 subjects with lung diseases. The registration accuracy was evaluated based on the concept of target registration error using 19 landmarks chosen at the bifurcations of segmental bronchi. The landmarks were identified, and the displacements of the landmarks were measured. The average displacements of the landmarks in x, y and z directions were 0.56 pixels+/-0.64 (SD), 0.56 pixels+/-0.62 (SD, standard deviation) and 0.28 sections+/-0.40 (SD), respectively. Differences in average displacements between the landmarks were not statistically significant. Our computer system demonstrated promising results. The average displacements of the landmarks were less than the dimensions of a voxel. Further study is necessary to determine whether such a computer system can improve the diagnostic performance of radiologists.
منابع مشابه
Automated classification of pulmonary nodules through a retrospective analysis of conventional CT and two-phase PET images in patients undergoing biopsy
Objective(s): Positron emission tomography/computed tomography (PET/CT) examination is commonly used for the evaluation of pulmonary nodules since it provides both anatomical and functional information. However, given the dependence of this evaluation on physician’s subjective judgment, the results could be variable. The purpose of this study was to develop an automated scheme for the classific...
متن کاملEnhancement of Lung Nodule Detection in Temporal Thoracic CT
Several 3-D tools were developed to facilitate the radiologists for the examination of thoracic CT images. The image functions include segmentation of suspected regions, characterization of the nodules, localized 3-D view of the nodules, 3-D transparent view, 3-D image matching and 3-D volume registration. The last two functions are particularly useful for the temporal CT examination which the ...
متن کاملReduction of Processing times for Temporal Subtraction on Lung Ct Image Employing Octree Algorithms
The temporal subtraction image, which can be obtained by subtracting previous image from current one, is useful for visual screening in clinical field. The temporal subtraction technique removes normal structures, e.g., blood vessel. Hence, it can enhance interval changes such as the new lesions and the changes of existing abnormalities on medical images. Recently, several temporal subtraction ...
متن کاملMultiple brown tumors in a patient with parathyroid adenoma depicting affinity for both 99mTc -pertechnetate and 99mTc-MIBI: Evaluation with hybrid SPECT/CT
Parathyroid adenoma involving a single parathyroid gland is the underlying cause of 80-85% of primary hyperparathyroidism (PHPT). Skeletal system is significantly affected by PHPT. Brown tumors are known to have affinity for 99mTc-MIBI. We report a rare case of PHPT presenting with diffuse bony pain, high calcium level and significantly elevated alkaline phosphatase level. 99m<...
متن کاملبررسی نمونههای آسیبشناسی حاصل از بیوپسی سوزنی با هدایت سیتیاسکن در ضایعات قفسه سینه بیماران مراجعهکننده به بخش پاتولوژی بیمارستان شهید صدوقی یزد
Introduction: Despite the popularity of needle biopsy for obtaining tissue samples in several solid organs, its use in thoracic lesions has been very restricted in some hospitals. This study intended to investigate the CT-Guided transthoracic core needle biopsy specimens in Yazd Shahid Sadoughi hospital during 2001- 2010. Methods: This is a retrospective cross- sectional study conducted on pat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The British journal of radiology
دوره 80 950 شماره
صفحات -
تاریخ انتشار 2007