Abstract：
:Surface morphology and shape in general are important predictors for the behavior of solid-type lung nodules detected on CT. More broadly, shape analysis is useful in many areas of computer-aided diagnosis and essentially all scientific and engineering disciplines. Automated methods for shape detection have all previously, to the author's knowledge, relied on some sort of geometric measure. I introduce Normal Mode Analysis Shape Detection (NMA-SD), an approach that measures shape indirectly via the motion it would undergo if one imagined the shape to be a pseudomolecule. NMA-SD allows users to visualize internal movements in the imaging object and thereby develop an intuition for which motions are important, and which geometric features give rise to them. This can guide the identification of appropriate classification features to distinguish among classes of interest. I employ normal mode analysis (NMA) to animate pseudomolecules representing simulated lung nodules. Doing so, I am able to assign a testing set of nodules into the classes circular, elliptical, and irregular with roughly 97 % accuracy. This represents a proof-of-principle that one can obtain shape information by treating voxels as pseudoatoms in a pseudomolecule, and analyzing the pseudomolecule's predicted motion.
journal_name
J Digit Imagingjournal_title
Journal of digital imagingauthors
Stember JNdoi
10.1007/s10278-014-9732-xsubject
Has Abstractpub_date
2015-04-01 00:00:00pages
224-30issue
2eissn
0897-1889issn
1618-727Xjournal_volume
28pub_type
杂志文章abstract：:Bone density measurement by quantitative computed tomography (QCT) commonly uses an external reference phantom to decrease scan-to-scan and scanner-to-scanner variability. However, the peripheral location of these phantoms and other phantom variables is also responsible for a measurable degradation in accuracy and pre...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03168013
更新日期：1989-02-01 00:00:00
abstract：:The standard definition of high-risk individuals for lung cancer was not uniform and the value of chest digital radiography (DR) in lung cancer screening was still unproven. The aim of this study was to assess whether the original questionnaire named as "Self-evaluation Scoring Questionnaire for High-risk Individuals ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-012-9468-4
更新日期：2013-02-01 00:00:00
abstract：:Managing and optimizing radiation dose has become a core problem for the CT community. As a fundamental step for dose optimization, accurate and computationally efficient dose estimates are crucial. The purpose of this study was to devise a computationally efficient projection-based dose metric. The absorbed energy an...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-016-9869-x
更新日期：2016-10-01 00:00:00
abstract：:Feedback is an essential part of medical training, where trainees are provided with information regarding their performance and further directions for improvement. In diagnostic radiology, feedback entails a detailed review of the differences between the residents' preliminary interpretation and the attendings' final ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-017-0015-1
更新日期：2018-02-01 00:00:00
abstract：:The goal of this study was to assess whether radiologists' search paths for lung nodule detection in chest computed tomography (CT) between different rendering and display schemes have reliable properties that can be exploited as an indicator of ergonomic efficiency for the purpose of comparing different display parad...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-007-9076-x
更新日期：2008-10-01 00:00:00
abstract：:Fibrous dysplasia (FD) is a developmental anomaly in which the normal medullary space of the affected bone is replaced by fibro-osseous tissue. This condition is typically encountered in adolescents and young adults. It affects the maxillofacial region and it can often cause severe deformity and asymmetry. Therefore, ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-015-9815-3
更新日期：2016-02-01 00:00:00
abstract：:Lung cancer has the highest mortality rate of all cancers, and early detection can improve survival rates. In the recent years, low-dose CT has been widely used to detect lung cancer. However, the diagnosis is limited by the subjective experience of doctors. Therefore, the main purpose of this study is to use convolut...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-020-00333-1
更新日期：2020-08-01 00:00:00
abstract：:This paper presents our solution for supporting radiologists' interpretation of digital images by automating image presentation during sequential interpretation steps. We extended current hanging protocols with support for "stages" which reflect the presentation of digital information required to complete a single ste...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-004-1906-5
更新日期：2005-06-01 00:00:00
abstract：:Perfusion CT of the liver typically involves scanning the liver at least 20 times, resulting in a large radiation dose. We developed and validated a simplified model of tumor blood supply that can be applied to standard triphasic scans and evaluated whether this can be used to distinguish benign and malignant liver le...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-014-9725-9
更新日期：2015-04-01 00:00:00
abstract：:The purpose of this study was to develop and evaluate a computerized method of calculating a breast density index (BDI) from digitized mammograms that was designed specifically to model radiologists' perception of breast density. A set of 153 pairs of digitized mammograms (cranio-caudal, CC, and mediolateral oblique, ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03168733
更新日期：1998-08-01 00:00:00
abstract：:Communicating radiological reports to peers has pedagogical value. Students may be uneasy with the process due to a lack of communication and peer review skills or to their failure to see value in the process. We describe a communication exercise with peer review in an undergraduate veterinary radiology course. The co...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-016-9905-x
更新日期：2017-02-01 00:00:00
abstract：:Stereotactic surgery requires knowledge of cerebral structures derived from more than one image source. We have developed a PC-AT-based workstation that accepts patient images, made with the stereotactic frame in place, from CT, MRI, and DSA modalities. Reference markers on the frame are identified in the images to es...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03168023
更新日期：1989-05-01 00:00:00
abstract：:Digital modalities such as CT, MRI, Ultrasound and Computerized Radiography systems, generating softcopy images to be used by a Picture Archiving and Communication System (PACS), need to identify the images properly in order to retrieve and manage them. In many cases, a technologist re-enters patient demographic and s...
journal_title：Journal of digital imaging
pub_type： 杂志文章,评审
doi：10.1007/BF03168256
更新日期：1998-08-01 00:00:00
abstract：:Frequently when patient and study identification information (patient name, patient identification, date of birth, sex, and accession number) are manually entered at a modality, typographical errors occur that have to be corrected before the acquired images can be matched to the proper patient and study on a picture a...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03190323
更新日期：2001-06-01 00:00:00
abstract：:A traditional radiological workflow is compared with one based on radiology information system/picture archiving and communication system (RIS/PACS). X-ray workflow process was considered in both radiology departments. First, the study identified the main phases of the research work as follows: Process Analysis, Data ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-006-0858-3
更新日期：2006-01-01 00:00:00
abstract：:Efficient data compression is essential for practical daily operation of computed radiography (CR) systems. In this study the clinical applicability of type III irreversible high data compression using an FCR 9501 chest unit (Fuji Photo Film, Tokyo, Japan) was evaluated. Sixty-eight normal and 93 various abnormal case...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03178080
更新日期：1998-11-01 00:00:00
abstract：:This article describes a segmentation technique that uses the watershed transformation to provide mass detection in dense breast digitized images. The technique consists of four steps: preprocessing, which isolates the breast from the image background; histogram equalization to enhance the contrast; watershed transfor...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-002-5071-4
更新日期：2002-01-01 00:00:00
abstract：:Extensive research efforts have been devoted to the feasibility of picture archiving and communication systems (PACS) in recent years. The advantages of PACS are numerous but mainly include reduced cost and improvement in the operational efficiency of a PACS-based radiology department. In digital radiography, images a...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03168839
更新日期：1997-11-01 00:00:00
abstract：:The goal of this study is to evaluate the efficacy of deep convolutional neural networks (DCNNs) in differentiating subtle, intermediate, and more obvious image differences in radiography. Three different datasets were created, which included presence/absence of the endotracheal (ET) tube (n = 300), low/normal positio...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-017-9980-7
更新日期：2017-08-01 00:00:00
abstract：:Recent technological innovations have created new opportunities for the increased adoption of virtual reality (VR) and augmented reality (AR) applications in medicine. While medical applications of VR have historically seen greater adoption from patient-as-user applications, the new era of VR/AR technology has created...
journal_title：Journal of digital imaging
pub_type： 杂志文章,评审
doi：10.1007/s10278-018-0122-7
更新日期：2019-02-01 00:00:00
abstract：:Fusion of CT and MR images allows simultaneous visualization of details of bony anatomy provided by CT image and details of soft tissue anatomy provided by MR image. This helps the radiologist for the precise diagnosis of disease and for more effective interventional treatment procedures. This paper aims at designing ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-013-9664-x
更新日期：2014-06-01 00:00:00
abstract：INTRODUCTION:To validate a preliminary version of a radiological lexicon (RadLex) against terms found in thoracic CT reports and to index report content in RadLex term categories. MATERIAL AND METHODS:Terms from a random sample of 200 thoracic CT reports were extracted using a text processor and matched against RadLex...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-007-9051-6
更新日期：2008-12-01 00:00:00
abstract：:As hospitals convert from conventional film-based imaging to picture archival and communications systems (PACS), methods for managing an enormous library of images must change considerably. While most hospitals are required to retain general, nonmammographic, radiologic images for 7 years beyond the examination date, ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03190304
更新日期：2001-06-01 00:00:00
abstract：:The strategic development and deployment of a health management information technology infrastructure is discussed from two perspectives for radiologists and for other medical technologists: the integrated delivery system (IDS) perspective and a total quality-management (TQM) perspective. On the one hand, an IDS persp...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/BF03168176
更新日期：1998-11-01 00:00:00
abstract：:Breast cancer is the most common type of malignancy diagnosed in women. Through early detection and diagnosis, there is a great chance of recovery and thereby reduce the mortality rate. Many preliminary tests like non-invasive radiological diagnosis using ultrasound, mammography, and MRI are widely used for the diagno...
journal_title：Journal of digital imaging
pub_type： 杂志文章,评审
doi：10.1007/s10278-019-00295-z
更新日期：2020-10-01 00:00:00
abstract：:In the UK, physicists and radiographers perform routine quality control (QC) of digital mammography equipment at daily, weekly and monthly intervals. The tests performed and tolerances are specified by standard protocols. The manual nature of many of the tests introduces variability due to the positioning of regions o...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-014-9759-z
更新日期：2015-10-01 00:00:00
abstract：:Scheduling of CT and MR exams requires reasonable estimates for expected scan duration. However, scan-time variability and efficiency gains from combining multiple exams are not quantitatively well characterized. In this work, we developed an informatics approach to quantify typical duration, duration variability, and...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-019-00252-w
更新日期：2020-02-01 00:00:00
abstract：:The objective of this study was to determine the clinical value of computed tomography (CT) image-based texture analysis in predicting microvascular invasion of primary hepatocellular carcinoma (HCC). CT images of patients with HCC from May 2017 to May 2019 confirmed by surgery and histopathology were retrospectively ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-020-00386-2
更新日期：2020-12-01 00:00:00
abstract：:The objective of this study is to retrospectively investigate whether using the newly developed algorithms would improve radiologists' accuracy for discriminating malignant masses from benign ones on ultrasonographic (US) images. Five radiologists blinded to the histological results and clinical history independently ...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-009-9245-1
更新日期：2010-10-01 00:00:00
abstract：:Multimodality medical image fusion plays a vital role in diagnosis, treatment planning, and follow-up studies of various diseases. It provides a composite image containing critical information of source images required for better localization and definition of different organs and lesions. In the state-of-the-art imag...
journal_title：Journal of digital imaging
pub_type： 杂志文章
doi：10.1007/s10278-015-9806-4
更新日期：2016-02-01 00:00:00
