1.RE: An Unusual Course of Right Coronary Artery Originating from Sinoatrial Node Artery.
Kemal KARA ; Ersin OZTURK ; Muzaffer SAGLAM
Korean Journal of Radiology 2014;15(6):878-878
No abstract available.
*Cardiac-Gated Imaging Techniques
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Coronary Vessel Anomalies/*radiography
;
Female
;
Humans
;
Male
;
Sinoatrial Node/*radiography
;
Tomography, X-Ray Computed/*methods
2.High-Definition Computed Tomography for Coronary Artery Stent Imaging: a Phantom Study.
Wen Jie YANG ; Ke Min CHEN ; Li Fang PANG ; Ying GUO ; Jian Ying LI ; Huang ZHANG ; Zi Lai PAN
Korean Journal of Radiology 2012;13(1):20-26
OBJECTIVE: To assess the performance of a high-definition CT (HDCT) for imaging small caliber coronary stents (< or = 3 mm) by comparing different scan modes of a conventional 64-row standard-definition CT (SDCT). MATERIALS AND METHODS: A cardiac phantom with twelve stents (2.5 mm and 3.0 mm in diameter) was scanned by HDCT and SDCT. The scan modes were retrospective electrocardiography (ECG)-gated helical and prospective ECG-triggered axial with tube voltages of 120 kVp and 100 kVp, respectively. The inner stent diameters (ISD) and the in-stent attenuation value (AVin-stent) and the in-vessel extra-stent attenuation value (AVin-vessel) were measured by two observers. The artificial lumen narrowing (ALN = [ISD - ISDmeasured]/ISD) and artificial attenuation increase between in-stent and in-vessel (AAI = AVin-stent - AVin-vessel) were calculated. All data was analyzed by intraclass correlation and ANOVA-test. RESULTS: The correlation coefficient of ISD, AVin-vessel and AVin-stent between the two observers was good. The ALNs of HDCT were statistically lower than that of SDCT (30 +/- 5.7% versus 35 +/- 5.4%, p < 0.05). HDCT had statistically lower AAI values than SDCT (15.7 +/- 81.4 HU versus 71.4 +/- 90.5 HU, p < 0.05). The prospective axial dataset demonstrated smaller ALN than the retrospective helical dataset on both HDCT and SDCT (p < 0.05). Additionally, there were no differences in ALN between the 120 kVp and 100 kVp tube voltages on HDCT (p = 0.05). CONCLUSION: High-definition CT helps improve measurement accuracy for imaging coronary stents compared to SDCT. HDCT with 100 kVp and the prospective ECG-triggered axial technique, with a lower radiation dose than 120 kVp application, may be advantageous in evaluating coronary stents with smaller calibers (< or = 3 mm).
Analysis of Variance
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Cardiac-Gated Imaging Techniques/methods
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Coronary Disease/*radiography/*therapy
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Humans
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Phantoms, Imaging
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Radiation Dosage
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Radiographic Image Interpretation, Computer-Assisted
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*Stents
;
Tomography, Spiral Computed/*methods
3.CT Radiation Dose Optimization and Estimation: an Update for Radiologists.
Korean Journal of Radiology 2012;13(1):1-11
In keeping with the increasing utilization of CT examinations, the greater concern about radiation hazards from examinations has been addressed. In this regard, CT radiation dose optimization has been given a great deal of attention by radiologists, referring physicians, technologists, and physicists. Dose-saving strategies are continuously evolving in terms of imaging techniques as well as dose management. Consequently, regular updates of this issue are necessary especially for radiologists who play a pivotal role in this activity. This review article will provide an update on how we can optimize CT dose in order to maximize the benefit-to-risk ratio of this clinically useful diagnostic imaging method.
Body Size
;
Cardiac-Gated Imaging Techniques/methods
;
Humans
;
*Radiation Dosage
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Radiographic Image Interpretation, Computer-Assisted
;
Radiometry
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Risk Assessment
;
Tomography, X-Ray Computed/*methods
4.Clinical value of ECG-gated dual-source computed tomography and angiography in assessing coarctation of aorta.
Liqing PENG ; Zhigang YANG ; Jianqun YU ; Zhigang CHU ; Dongdong CHEN ; Yi LUO
Journal of Biomedical Engineering 2013;30(1):89-94
The purpose of this study was to explore the clinical value of ECG-gated dual-source CT angiography (DSCTA) in evaluating coarctation of aorta (CoA). 23 patients suspected with CoA underwent DSCTA and transthoracic echocardiography (TTE). Surgical results were taken as reference standard. 23 patients were diagnosed with CoA, 12 cases had focal stenosis of aorta, while 11 had tubular stenosis. 19 cases were associated with other cardiovascular malformations, including 5 cases of hypoplastic aortic arch, 5 of patent ductus arteriosus, 10 of ventricular septal defect, 2 of bicuspid aortic valve, 4 of collateral arteries, 2 of aberrant left subclavian artery and 2 of persistent left superior vena cava, respectively. The mean diameter of stenotic segment of aorta was (7.0 +/- 3.7) mm. In 9 patients with tubular CoA, the diameter and length of stenotic segment of aorta were (6.2 +/- 7. 3) mm and (29.2 +/- 5.9) mm, respectively. The accuracies of DSCTA and TTE in the diagnosis of CoA were 100% and 91.3% (P > 0.05), respectively. It is well concluded that ECG-gated DSCTA could accurately evaluate CoA and associated cardiovascular malformations, and provide detailed anatomic information before surgery.
Adolescent
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Adult
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Angiography
;
methods
;
Aortic Coarctation
;
diagnostic imaging
;
surgery
;
Cardiac-Gated Imaging Techniques
;
methods
;
Child
;
Child, Preschool
;
Contrast Media
;
Echocardiography
;
Electrocardiography
;
methods
;
Female
;
Humans
;
Infant
;
Male
;
Tomography, X-Ray Computed
;
methods
;
Young Adult
5.Ventriculus Terminalis in Adults: Unusual Magnetic Resonance Imaging Features and Review of the Literature.
Sang Hyun SUH ; Tae Sub CHUNG ; Seung Koo LEE ; Yong Eun CHO ; Keun Su KIM
Korean Journal of Radiology 2012;13(5):557-563
OBJECTIVE: The ventriculus terminalis (VT) in adults is a rare pathology. We report various MR imaging features of the adult VT. MATERIALS AND METHODS: Ten patients were included in this retrospective review.. All patients had undergone magnetic resonance (MR imaging with a surface coil that used two different 1.5T MR systems. All patients had undergone initial and follow-up MR imaging with contrast enhancement using gadopentate dimeglumine. Three patients underwent additional MR imaging using the echocardiogram-gated spatial modulation of magnetization (SPAMM) technique. If a shift in tagging band during the systolic phase was less than half of the band space, it was defined as a "non-pulsatile fluid". Two neuroradiologists independently reviewed these images, while clinical symptoms and outcomes were statistically analyzed between the treated and non-treated group. RESULTS: All cases presented an intramedullary cystic lesion in the conus medullaris and showed the same signal intensity as CSF. Three VTs had intracystic septation and cord edema, which were pathologically confirmed after surgery; two of these were associated with kyphotic deformity and spinal arteriovenous malformation. SPAMM-MRI of 3 patients demonstrated non-pulsatile fluid motion within the VT. In the treated group, clinical symptoms improved better than the non-treated group. CONCLUSION: The adult VT shows some unusual imaging features, including septation, cord edema, and coexistence of a spinal AVM, as well as the typical findings. Surgical maneuvers may be considered as a treatment option in adult VT with progressive neurological symptoms.
Adult
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Cardiac-Gated Imaging Techniques
;
Contrast Media/diagnostic use
;
Cysts/*diagnosis/physiopathology
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Diagnosis, Differential
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Female
;
Gadolinium DTPA/diagnostic use
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Humans
;
Magnetic Resonance Imaging/*methods
;
Male
;
Retrospective Studies
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Spinal Cord Diseases/*diagnosis/physiopathology
6.Three-dimensional volume rendering for dynamic characteristics of secundum atrial septal defect during various phases of the cardiac cycle and the impact on occluder selection.
Hui Jun SONG ; Shi Guo LI ; Qiong LIU ; Jing Lin JIN ; Kai YANG ; Jing ZHANG ; Zhong Ying XU ; Xiang Bin PAN ; Shi Hua ZHAO
Chinese Journal of Cardiology 2022;50(8):805-810
Objective: To investigate the dynamic change of the secundum atrial septal defect (ASD) throughout the cardiac cycle, and assess its impact on occluder selection. Methods: This study retrospectively analyzed 35 patients with ASD who received electrocardiogram-gated coronary CT angiography (CCTA) throughout the cardiac cycle as well as interventional closure therapy in Fuwai Hospital from December 2016 to December 2019. The raw data were reconstructed into 20 phasic images of RR intervals (RRI) ranging from 0 to 95% in an increment of 5% and transmitted to a workstation for postprocessing. For each phase image, CT virtual endoscopy reconstruction technique (CTVE) was used to provide views of ASD. Axial sequence assisted CT volumetric measurement (CTAS) was used to calculate the maximum dimensions in axial planes (Da) and in superior-inferior direction (Db). Using a formula for converting circumference to diameter, the equivalent circle dimensions were calculated (De, De=minor axis+2 (major axis-minor axis)/3). Taking the data of 75% RRI phase, the patients were divided into Da75%RRI≥Db75%RRI group and Da75%RRI
Adult
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Cardiac-Gated Imaging Techniques
;
Computed Tomography Angiography
;
Coronary Angiography
;
Electrocardiography/methods*
;
Female
;
Heart Septal Defects, Atrial/surgery*
;
Humans
;
Imaging, Three-Dimensional
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Male
;
Middle Aged
;
Retrospective Studies
;
Septal Occluder Device
7.Anatomy of the Sinoatrial Nodal Branch in Korean Population: Imaging with MDCT.
Yong Sub SONG ; Whal LEE ; Eun Ah PARK ; Jin Wook CHUNG ; Jae Hyung PARK
Korean Journal of Radiology 2012;13(5):572-578
OBJECTIVE: To evaluate, on a retrospective basis, the anatomic characteristics of the arterial supply to the sinoatrial node (SAN) in the Korean population using an ECG-gated multi-detector CT (MDCT). MATERIALS AND METHODS: The electrocardiographic-gated MDCTs of 500 patients (258 men and 242 women; age range, 17-83 years; mean age, 58.6 +/- 12.04 years) were analyzed retrospectively. In each case, the SAN artery (arteries) was named according to a special nomenclature with regard to origin, course, and termination. RESULTS: A total of 516 SAN arteries were visualized in 496 patients. The SAN was supplied by a single artery in 476 (96.4%) cases and by 2 arteries in 18 (3.6%) cases. The SAN originated from the right coronary artery in 265 (53.4%) cases and from the left circumflex in 213 (43%) cases. CONCLUSION: This study can provide basic data on variations of the SAN artery in the Korean population.
Adolescent
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Adult
;
Aged
;
Aged, 80 and over
;
*Cardiac-Gated Imaging Techniques
;
Coronary Vessel Anomalies/*radiography
;
Female
;
Humans
;
Male
;
Middle Aged
;
Republic of Korea
;
Retrospective Studies
;
Sinoatrial Node/*radiography
;
Tomography, X-Ray Computed/*methods
8.Clinical value of ECG-gated dual-source computed tomography and angiography in assessing pulmonary atresia with ventricular septal defect.
Long ZHAO ; Liqing PENG ; Jianqun YU ; Qi AN
Journal of Biomedical Engineering 2012;29(6):1084-1088
The purpose of this study is to explore the clinical value of ECG-gated dual-source CT angiography (DSCTA) in evaluating pulmonary atresia with ventricular septal defect (PA-VSD). We carried out retrospective analysis on 20 patients who had DSCTA with PA-VSD. The emphasis of the work was on analyzing the types of PA-VSD, pulmonary artery development, major aorto-pulmonary artery collateral arteries (MAPCAs) and associated intra- and extra-cardiac malformations. In the 20 cases of PA-VSD, there were 6 cases of type A , 13 cases of type B, and 1 case of type C. 12 cases of the patients had patent ductus arteriosus (PDA). The pulmonary blood flow was mainly supplied by PDA in 6 cases and by MAPCAs in the rest of 14 cases. The diameter of MAPCAs was (7.2 +/- 3.4) mm (range, 2.0-14.3 mm). The experiments proved that ECG-gated DSCTA was a convenient and noninvasive cardiovascular imaging method, and it could accurately evaluate the types of PA-VSD, pulmonary artery development, MAPCAs, and it could also provide detailed anatomic information before surgery.
Abnormalities, Multiple
;
diagnostic imaging
;
Adolescent
;
Adult
;
Angiography
;
methods
;
Cardiac-Gated Imaging Techniques
;
methods
;
Child
;
Child, Preschool
;
Contrast Media
;
Female
;
Heart Septal Defects, Ventricular
;
diagnostic imaging
;
Humans
;
Infant
;
Male
;
Pulmonary Atresia
;
diagnostic imaging
;
Retrospective Studies
;
Tomography, X-Ray Computed
;
methods
;
Young Adult
9.Spontaneous Obliteration of Right Ventricular Pseudoaneurysm after Blunt Chest Trauma: Diagnosis and Follow-Up with Multidetector CT.
Taekyung KANG ; Mi Jin KANG ; Jae Hyung KIM
Korean Journal of Radiology 2014;15(3):330-333
Right ventricular (RV) pseudoaneurysm caused by trauma is very rare. We report a case of RV pseudoaneurysm which resolved without surgical treatment in a patient who survived a falling accident. Echocardiography failed to identify the pseudoaneurysm. Electrocardiography-gated CT showed a 17-mm-sized saccular pseusoaneurysm arsing from the RV outflow tract with a narrow neck. Follow-up CT after two months showed spontaneous obliteration of the lesion.
Accidental Falls
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Aneurysm, False/etiology/*radiography/ultrasonography
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Cardiac-Gated Imaging Techniques/methods
;
Echocardiography/methods
;
Female
;
Follow-Up Studies
;
Heart Aneurysm/etiology/*radiography/ultrasonography
;
Heart Ventricles/injuries/radiography/ultrasonography
;
Humans
;
Middle Aged
;
Multidetector Computed Tomography/*methods
;
Remission, Spontaneous
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Thoracic Injuries/*complications
;
Wounds, Nonpenetrating/*complications