• Proceedings of the KOSOMBE Conference
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• v.1997 no.11
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• pp.528-532
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• 1997

X-Ray Angiography has been gold standard or imaging of blood flow. However, patients have to take many risks such as catheterization procedure, iodine contrast agent and ionizing X-rays. MR Angiography has been suggested as a substitute for its non-hazard to patient. But the resolution and contrast was inferior to that of X-ray Angiography. Recently the resolution and the contrast have been much improved due to the development of fast imaging technique.

• Journal of Veterinary Clinics
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• v.18 no.4
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• pp.459-464
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• 2001

Excretory urography is a procedure where opacification of the kidneys, renal pelvic diverticula, ureters, and urinary bladder is a result of renal excretion of an intravenously administered iodinated contrast agent providing both anatomical and functional assessment. And ultrasonography is a non-invasive modality to evaluate the important anatomic information concerning the size, shape, and internal architecture of kidney even in the presence of impaired renal function or abdominal fluid. We describe four dogs with urological signs diagnosed with excretory urography and ultrasonography. Parients showed a variety of clinical signs including vomiting, hematuria, anorexia, abdominal pain, and abdominal distension. The hydronephrosis was diagnosed in case 1, 2, and 3 that had pelvic dilation, dilation of pelvic recesses, ureteral dilation. In case 3, proximal ureteral rupture was diagnosed with evidence of contrast media leakage was seen in proximal ureter. In case 4, the rupture of urinary bladder was diagnosed with leakage of contrast media through its ventral portion.

• Proceedings of the Korean Magnestics Society Conference
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• 2004.12a
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• pp.115-116
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• 2004

• 대한핵의학회:학술대회논문집
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• 2003.11a
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• pp.27.2-27.2
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• 2003

• Polymer Science and Technology
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• v.26 no.3
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• pp.221-225
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• 2015

• Proceedings of the Korean Magnestics Society Conference
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• 2008.12a
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• pp.250.2-250.2
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• 2008

• Proceedings of the Korean Magnestics Society Conference
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• 2008.12a
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• pp.83.1-83.1
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• 2008

• Korean Circulation Journal
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• v.48 no.11
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• pp.1028-1029
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• 2018

• Journal of the Korean Society of Radiology
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• v.12 no.3
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• pp.417-425
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• 2018

The psychological anxiety of radiologists, as well as the patients, is growing with the increasing use of CT contrast agent side effects and the process of extravasation. In this study, a satisfaction survey was conducted regarding the wireless signal device after CT examination in patients and radiologists by employing a wireless signal device during a contrast-enhanced CT examination in order to determine its usefulness to the relieve psychological anxiety, such as anxiety and fear, of patients and radiologists when using contrast agents. The use of a wireless signal device was also intended to help radiologists in dealing with the side effects of contrast agents that may occur during a CT examination and preventing extravasation. Patients aged 20 years or older, who visited the C university hospital in Jeonnam province for 4 months from August to November in 2017, were surveyed. A total number of 90 patients (57 males and 33 females),who agreed to the study after CT examination, were included in the questionnaire survey. Meanwhile, 15 radiologists, who were working at a CT room and had an experience in using a wireless signal device, were surveyed. Patient satisfaction was $6.01{\pm}0.88$ before the use of a wireless signal device and $8.20{\pm}1.06$ after use, thereby showing an increased satisfaction after its use. Radiologist satisfaction was $8.46{\pm}1.06$ after use, thereby not showing a big difference from the mean patient satisfaction. The satisfaction was high at over 8 points in both groups. The contribution to psychological stability with the use of a wireless signal device was $8.98{\pm}0.65$ in patients with prior experience of side effects and $8.00{\pm}1.21$ in patients without prior experience of side effects. In conclusion, it is considered to improve satisfaction with the examination by helping the radiologists in taking immediate action with calling via the wireless signal device and providing the patients and radiologists with psychological stability by reducing their anxiety.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.3
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• pp.1609-1614
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• 2013

Objective: To evaluate the effect of intravenous contrast on dose calculation in radiation treatment planning for oesophageal cancer. Methods: A total of 22 intravein-contrasted patients with oesophageal cancer were included. The Hounsfield unit (HU) value of the enhanced blood stream in thoracic great vessels and heart was overridden with 45 HU to simulate the non-contrast CT image, and 145 HU, 245 HU, 345 HU, and 445 HU to model the different contrast-enhanced scenarios. 1000 HU and -1000 HU were used to evaluate two non-physiologic extreme scenarios. Variation in dose distribution of the different scenarios was calculated to quantify the effect of contrast enhancement. Results: In the contrast-enhanced scenarios, the mean variation in dose for planning target volume (PTV) was less than 1.0%, and those for the total lung and spinal cord were less than 0.5%. When the HU value of the blood stream exceeded 245 the average variation exceeded 1.0% for the heart V40. In the non-physiologic extreme scenarios, the dose variation of PTV was less than 1.0%, while the dose calculations of the organs at risk were greater than 2.0%. Conclusions: The use of contrast agent does not significantly influence dose calculation of PTV, lung and spinal cord. However, it does have influence on dose accuracy for heart.