Effect of contrast enhancement in delineating GTV and constructing IGTV of thoracic oesophageal cancer based on 4D-CT scans

2016 ◽  
Vol 119 (1) ◽  
pp. 172-178 ◽  
Author(s):  
Jin-Zhi Wang ◽  
Jian-Bin Li ◽  
Huan-Peng Qi ◽  
Yan-Kang Li ◽  
Yue Wang ◽  
...  
Keyword(s):  
Contrast Enhancement ◽  
Oesophageal Cancer ◽  
Ct Scans ◽  
4D Ct

scholarly journals EP-1655: Changes of tumour volume and motion in oesophageal cancer during radiotherapy based on repeated 4D-CT scans

2015 ◽  
Vol 115 ◽  
pp. S907
Author(s):  
J.Z. Wang ◽  
J.B. Li ◽  
H.P. Qi ◽  
W. Wang ◽  
Y.J. Zhang
Keyword(s):  
Oesophageal Cancer ◽  
Tumour Volume ◽  
Ct Scans ◽  
4D Ct

Computed Tomographic Discography in the Evaluation of Extreme Lateral Disc Herniation

Neurosurgery ◽  
1984 ◽  
Vol 14 (3) ◽  
pp. 350-352 ◽  
Author(s):  
J. C. Angtuaco Edgardo ◽  
C. Holder John ◽  
C. Boop Warren ◽  
F. Binet Eugene
Keyword(s):  
Lumbar Spine ◽  
High Resolution ◽  
Contrast Enhancement ◽  
Thin Section ◽  
Preoperative Evaluation ◽  
Intervertebral Discs ◽  
Ct Scans ◽  
Computed Tomographic ◽  
Disc Herniations ◽  
Lateral Disc Herniation

Abstract Thin section, high resolution computed tomographic (CT) scans of the lumbar spine produce images that can show herniated intervertebral discs without intravenous or intrathecal contrast enhancement. With this technique, the diagnosis of posterolateral and midline herniation has been greatly facilitated. This communication reports the use of CT discography in the preoperative evaluation of two patients who were shown at discography and proven at operation to have extreme lateral disc herniations.

Computed Tomography of the Postoperative Intervertebral Disc and Lumbar Spinal Canal: Serial Long-Term Investigation in 19 Patients after Successful Operation for Lumbar Disc Herniation

Neurosurgery ◽  
1991 ◽  
Vol 29 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Raoul Heilbronner ◽  
Heinz Fankhauser ◽  
Pierre Schnyder ◽  
Nicolas de Tribolet
Keyword(s):  
Contrast Enhancement ◽  
Lumbar Disc Herniation ◽  
Disc Herniation ◽  
Lumbar Disc ◽  
Signs And Symptoms ◽  
Failed Back Surgery Syndrome ◽  
Ct Scans ◽  
X Rays ◽  
Successful Operation ◽  
Failed Back Surgery

Abstract The first part of this work, published in 1988, included 25 patients who had computed tomographic (CT) scans without contrast enhancement and plain x-rays of the lumbar spine before, 1 week after, and 6 to 7 weeks after a successful operation for lumbar disc herniation. The present study extends the follow-up period to 3 years in 19 of the 25 original patients. Clinical examinations, lateral plain x-rays, and CT scans without contrast enhancement of the operated disc were repeated. The results indicate a decrease or even a disappearance of the hyperdense extradural material thought to represent fibrosis. An image suggestive of persistent disc herniation was still present in 5 of 8 patients with this finding on early postoperative CT scans. Persistent intradiscal gas was seen in nearly half of the patients. Total normalization of the posterior extraspinal structures was the rule. There was no correlation between CT appearance and residual complaints of the patients. CT scans without contrast enhancement may be sufficient to guide the surgeon in postoperative patients with massive signs and symptoms of recurrent root compression in whom a second operation is indicated on clinical grounds. In all other cases, myelography followed by CT scans is considered appropriate to investigate failed back surgery syndrome. (Neurosurgery 29:1-7, 1991)

scholarly journals A Comparison of CT Contrast Enhancement and BUDR Labeling Indices in Moderately and Highly Anaplastic Astrocytomas of the Cerebral Hemispheres

1992 ◽  
Vol 19 (1) ◽  
pp. 34-39 ◽  
Author(s):  
Michael W. McDermott ◽  
Hendrikus G.J. Krouwer ◽  
Akio Asai ◽  
Satoyuki Ito ◽  
Takao Hoshino ◽  
...  
Keyword(s):  
Contrast Enhancement ◽  
Computerized Tomography ◽  
Cerebral Hemisphere ◽  
Cerebral Hemispheres ◽  
Labeling Index ◽  
Ct Scans ◽  
Proliferative Potential ◽  
Ct Contrast

ABSTRACT:Contrast enhancement on computerized tomography (CT) scans has been used in directing therapy for presumed intracranial gliomas. However, for moderately anaplastic astrocytomas (MOAAS) and highly anaplastic astrocytomas (HAAS), it provides no information about proliferative potential. The bromodeoxyuridine (BUDR) labeling index (LI), however, indicates proliferative potential, correlating with histologic malignancy and survival. An LI < 1% is a favorable indicator; LI > 5% suggests more aggressiveness. To determine the correlation, if any, between BUDR LI and contrast enhancement, CT scans of 71 patients with cerebral hemisphere tumors labeled with BUDR were retrospectively reviewed. Among 36 MOAAS, the BUDR LI was < 1% in 77% of enhanced tumors and 61% of unenhanced tumors. Among 35 HAAS, it was < 5% in 56% of enhanced tumors and 90% of unenhanced tumors. Therefore, contrast enhancement on CT scans does not always correctly predict proliferative potential in these tumors, and biopsy and labeling studies are recommended before therapy.

SU-E-J-137: A Theoretical Model for the Analysis of Residual Motion Artifacts in 4D CT Scans

2012 ◽  
Vol 39 (6Part8) ◽  
pp. 3684-3684
Author(s):  
T Kim ◽  
J Yoon ◽  
S Kang ◽  
T Suh
Keyword(s):  
Theoretical Model ◽  
Motion Artifacts ◽  
Ct Scans ◽  
4D Ct ◽  
Residual Motion

TU-C-213CD-05: 4D-CT Simulation Using Individually Optimized Contrast Enhancement (CE): A Phantom Study

2012 ◽  
Vol 39 (6Part23) ◽  
pp. 3903-3903
Author(s):  
M Xue ◽  
W D'Souza ◽  
G Lasio ◽  
P Klahr ◽  
W Lu
Keyword(s):  
Contrast Enhancement ◽  
Phantom Study ◽  
4D Ct ◽  
Ct Simulation

scholarly journals Defining target volumes for stage I NSCLC using a single 4D CT scan (versus a single standard CT and 6 standard CT scans)

2004 ◽  
Vol 60 (1) ◽  
pp. S290
Author(s):  
B.J. Slotman ◽  
F.J. Lagerwaard ◽  
R.W. Underberg ◽  
J.P. Cuijpers ◽  
J.R. van Sornsen de Koste ◽  
...  
Keyword(s):  
Ct Scan ◽  
Stage I ◽  
Ct Scans ◽  
4D Ct ◽  
Target Volumes ◽  
Single Standard

Postoperative CT contrast enhancement following lobectomy for epilepsy

1990 ◽  
Vol 73 (3) ◽  
pp. 392-395 ◽  
Author(s):  
Varun Laohaprasit ◽  
Daniel L. Silbergeld ◽  
George A. Ojemann ◽  
Joseph M. Eskridge ◽  
H. Richard Winn
Keyword(s):  
Contrast Enhancement ◽  
Computerized Tomography ◽  
Contrast Material ◽  
Residual Tumor ◽  
Ct Scans ◽  
Resection Margins ◽  
Normal Brain ◽  
Content Type ◽  
Preoperative Ct ◽  
Ct Contrast

✓ Contrast-enhanced computerized tomography (CT) is frequently utilized immediately after surgery to determine the presence of residual tumor, but the response of nontumor brain tissue is unclear. Consequently, the authors investigated the postoperative CT contrast enhancement in six patients undergoing lobectomy for epilepsy. Preoperative CT scans were obtained in all cases and revealed no enhancing lesions. All patients underwent craniotomy with electrocorticography while awake, followed by lobectomy. Computerized tomography scans with and without administration of contrast material were obtained on postoperative Days 3, 7, and 30. Edema, artifact, and enhancement of the resection margins were seen on postoperative Days 3 and 7, but had resolved in all patients by Day 30. It is concluded that postoperative CT scans for assessment of residual tumor are best obtained at 30 days or thereafter, when normal brain does not enhance and edema and artifact have diminished.

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