【私のイチオシ！】RSNA2011注目の演題：中村優子先生（広島大学）

【私のイチオシ！】コーナーでは、先生方が注目する面白そうなセッションや口演・ポスター発表等についてご紹介します。

中村優子先生(広島大学大学院医歯薬学総合研究科放射線診断学)が注目するセッションはこちらです!

LL-GIE2645
Capability and Pitfalls of Hepatic Dynamic MRI Using Gd-EOB-DTPA in the Diagnosis of Hepatic SOLs
Yuko Nakamura et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
1. The sensitivity of EOB-MRI for hepatic tumors is higher than of other imaging modalities.
2. In patients with liver damage hepatic EOB uptake is lower and tumors can be obscured. Liver and spleen intensity must be compared to confirm hepatic enhancement.
3. In patients with portal tumor embolism or arterioportal shunt, tumor extension on hepatobiliary phase scans can be overestimated.
4. To differentiate hepatic hemangiomas from metastatic tumors is difficult on EOB-MRI. T2WI is better.

LL-GIE2664
Imaging Hepatocellular Carcinoma after Locoregional Therapy: Impact of Hepatocyte-specific MR Contrast Agents
Daniel C. Bar et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
Newer hepatocyte-specific MR contrast agents may exhibit some variation from traditional extracellular agents in their dynamic enhancement profile as well as providing unique information about excretory capacity of tumors in the hepatobiliary phase. Typical enhancement patterns for HCC post therapy have not been firmly established for hepatocyte-specific agents, and this exhibit will illustrate the gamut of appearances for this important imaging indication.

RC529B
Choosing a Contrast Agent for Abdominal MR Imaging
Hero Hussai et al
DATE: Wednesday, November 30 2011
TIME: 08:30 AM – 10:00 AM
LOCATION: S404AB
●LEARNING OBJECTIVES:
1) Describe the major groups of contrast agents currently available for abdominal MR imaging, including non-tissue specific and tissue-specific agents, and their mechanism of action. 2) Discuss the clinical indications for each agent, contraindications and suggested doses. 3) Explain how to select the most appropriate agent for liver imaging and techniques to optimize image quality and avoid potential pitfalls.

LL-NME2420
What Is the Optimal Time to Assess the Therapeutic Response of Lung Cancer on FDG-PET Scans?
Daisuke Komoto et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
FDG-PET is highly useful for the assessment of therapeutic responses of lung cancer because it can identify decreases in tumor metabolism before shrinkage of the tumor size. While assessment of the response in the early phase of therapy is desirable, the optimal timing for post-treatment PET study remains to be determined. We discuss the optimal time for assessing the response of lung cancer to therapy.

LL-OBE2556
Clinical Role of Multidetector CT (MDCT) in the Prenatal Diagnosis of Skeletal Dysplasia
Chihiro Tani et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
Compared with US, MDCT yields an accurate prenatal diagnosis of skeletal dysplasia because it demonstrates the entire skeletal system, metaphyseal abnormalities, and decreased mineralization. MRI is inferior to CT because it cannot evaluate fetal bone mineralization. The radiation dose at fetal CT may be within an acceptable range from the standpoint of the genesis of malformation or cancer, however, a dose reduction is highly desirable from the standpoint of the ALARA principle.

SSA08-07
Low Contrast and Low Radiation Dose Protocol for Hepatic Dynamic CT at 256-Row CT: Usefulness of Low Tube Voltage and iDose Reconstruction Algorithm
Takeshi Nakaura et al
DATE: Sunday, November 27 2011
TIME: 11:45 AM – 11:55 AM
LOCATION: E450B
●PURPOSE:
It has been suggested that low tube voltage scanning allows reducing the radiation- and contrast dose, and that the iterative reconstruction algorithm improves image quality at low tube voltage scanning. We evaluated the feasibility of a low contrast-, low radiation dose protocol at abdominal dynamic CT using 80 kVp and “hybrid iterative reconstruction algorithm (iDose)” at 256-row CT.

LL-GIE2694
Traumatic Hypovolemic Shock Revisited: Spectrum and New Observations of Abdominal CT Findings in Emergency Room
Akihiko Kanki et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
The major teaching points of this exhibit are:
1. There are several characteristic abdominal CT findings in traumatic hypovolemic shock.
2. Controversial CT signs will be dependent on the stage of hypovolemic shock.
3. New CT observations are useful in determining management and in predicting clinical prognosis in patients with traumatic hypovolemic shock.

LL-PPE1029
Fukushima Nuclear Accident: How Can Radiologists Mitigate the Publics’ Fear to Ionizing Radiation and Radioactive Materials?
Kazuko Ohno et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
We received various questions from general public to mitigate their worry about harmful effects of radiation exposure, especially to their children and fetuses. Information we provided might be not sufficient for solving their anxieties, and communication seemed to be more important. We also posted up Q&A corner on the website of the Japan Radiological Society and have updated according to the state of the accident and publics’ major concerns.

LL-MSE2267
Imaging Treatment Response in Hypervascular Malignancies Following Molecular Targeted Therapy: Primer for Imagers
Shetal Shah et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
Recent advances in targeted therapy present promising new options for patients with advanced RCC, HCC, and GIST. The knowledge and application of newer morphologic and functional response criteria for these malignancies enable a semi-quantitative and accurate tumor response assessment.

LL-GIS-MO1B
Assessing Necroinflammatory Activity and Fibrosis of the Liver Using Proton MR Spectroscopy in Patients with Chronic Liver Damage
Satoshi Goshima et al
　●Scientific Informal (Poster) Presentations
CODE: LL-GIS-MO
SESSION: Gastrointestinal
DATE: Monday, November 28 2011
TIME: 12:15 PM – 01:15 PM
LOCATION: Lakeside Learning Center

SSK06-08
MR Elastography Can Predict an Insufficient Liver Enhancement on Gadoxetic Acid-enhanced Hepatocyte-phase MR Imaging in Patients with Child-Pugh Class A Diseas
Utaroh Motosugi et al
DATE: Wednesday, November 30 2011
TIME: 11:40 AM – 11:50 AM
LOCATION: E353B
●PURPOSE:
To compare the utility of MR Elastography with laboratory test results for predicting insufficient hepatic enhancement on hepatocyte-phase image after administration of gadoxetic acid (EOB-MRI).

LL-ERE2288
Ouch!! Abdominal Pain in Pregnancy and It Is Not the Baby!!
Manjiri Dighe et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
The major teaching points of this exhibit are as follows:
1. Learn the causes of abdominal pathology in pregnant patients and how to further evaluate them on imaging while minimizing radiation exposure.
2. Review multimodality imaging appearances of various causes of non-obstetric abdominal pain and masses.

LL-NME2429
68Ga DOTATATE PET/CT: Patterns of Physiological Uptake, Normal Variants, Artifacts, and Pitfalls
Meeran Naji et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
This exhibit would enable the viewer to
1. Be familiar with the normal physiological distribution of 68Ga DOTATATE, frequently encountered normal variants, and benign pathological causes of uptake that can be confused with malignancy.
2. Recognise several potential pitfalls and artefacts so that radiologists can avoid false positive diagnoses and recognise inherently non-specific findings.

SSJ07-05
Is It Really ‘Dilated’? Analysis of the Diameter of the Main Pancreatic Duct in Health-check Population
Minobu Kamo et al
DATE: Tuesday, November 29 2011
TIME: 03:40 PM – 03:50 PM
LOCATION: E353C
●PURPOSE:
Dilatation of the main pancreatic duct (MPD) is one of the most important signs in detecting pancreatic cancer or cancer of the papilla in the earlier stage. It is also important in assessing intraductal lesions such as intraductal papillary neoplasms (IPMNs). To evaluate the clinical significance of MPD dilatation, we retrospectively reviewed subjects in which MPD dilatation was detected in our general health check program.

MSVU51-06
Genitourinary Series: The Abdominal Incidentaloma?What to Report for the Hepatic, Pancreatic, Adrenal, and Renal Incidentaloma
Pancreatic Cysts: What to Say
Alec Megibow et al
DATE: Thursday, December 01 2011
TIME: 09:35 AM – 09:55 AM
LOCATION: E350
●LEARNING OBJECTIVES:
1) Appreciate the scope and nature of the problem of abdominal incidental findings and the background of the development of new proposed guidelines for managing some abdominal incidental findings. 2) Be able to determine how to reference and apply the new guidelines for following or working-up hypoattenuating, or flash-filling incidental liver masses. 3) Better understand the complexities of managing pancreatic cystic masses, adrenal incidentalomas and small renal cystic, and solid masses, and to understand when and how to reference the new guidelines.

LL-ERE2282
Transmural or Not? That Is the Question: Can We Answer It before the Intestine Is Examined by the Pathologist? Pictorial Review of Acute MESENTERIC ISCHEMIA with MDCT and Its Pathologic Correlation
Alejandro Marin et al
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY:
MDCT is an essential tool for the early diagnosis of acute mesenteric ischemia, and for detection of transmural necrosis. These points are very important because they may influence the treatment and prognosis. The knowledge of the physiopathology and correlation with pathology helps radiologists to accurately interpret the key features in the different types of AMI.