𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Development of a 3D dynamic imaging technique with a multi-pinhole γ-camera

✍ Scribed by Hisato Takemoto; Kenichi Watanabe; Jun Kawarabayashi; Tetsuo Iguchi

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
659 KB
Volume
579
Category
Article
ISSN
0168-9002

No coin nor oath required. For personal study only.

✦ Synopsis

We propose a multi-pinhole g-camera, comprising multi-pinhole collimators and flat-panel detectors (FPDs), in order to facilitate dynamic imaging of low-energy g-ray emitters, such as 99m Tc. The collimator comprises an array of 9 Â 9 pinholes with an opening angle of 601, these pinholes are aligned in a lattice arrangement. In order to experimentally verify the 3D imaging capabilities of this g-camera design, we have conducted preliminary experiments to measure the profile of a thin disk 57 Co (122 keV) g-ray source with a prototype system by using an imaging plate instead of the FPD. The results indicate that it would be able to identify the location of the 57 Co g-ray sources with a spatial resolution of 2.5 mm. We have also carried out a preliminary experiment by using FPD. The results have shown that the proposed system using FPD (C9250DP) could have a time resolution of 13 s per one image for a simple distribution of a 37 MBq 99m Tc source.

📜 SIMILAR VOLUMES

Accelerated dynamic MR imaging with a pa
Accelerated dynamic MR imaging with a parallel imaging technique for hypervascular hepatocellular carcinomas: Usefulness of a test bolus in examination and subtraction imaging
✍ Nobuyuki Takahashi; Hiroshi Yoshioka; Masayuki Yamaguchi; Yukihisa Saida; Yuji I 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 636 KB

## Abstract ## Purpose To assess the impact of the accelerated dynamic MR imaging (ADMRI) approach using parallel imaging for detecting hypervascular hepatocellular carcinomas (HCCs) and to evaluate the usefulness of a test bolus in examination and subtraction imaging in this setting. ## Material

Improving detection of siderotic nodules
Improving detection of siderotic nodules in cirrhotic liver with a multi-breath-hold susceptibility-weighted imaging technique
✍ Yongming Dai; Mengsu Zeng; Ruokun Li; Shengxiang Rao; Caizhong Chen; Zachary Del 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 642 KB

## Abstract ## Purpose: To evaluate the role of abdominal susceptibility‐weighted imaging (SWI) in the detection of siderotic nodules in cirrhotic liver. ## Materials and Methods: Forty patients with pathologically identified liver cirrhosis and 40 age/sex‐matched normal controls underwent T1‐,

Prostate cancer detection with multi-par
Prostate cancer detection with multi-parametric MRI: Logistic regression analysis of quantitative T2, diffusion-weighted imaging, and dynamic contrast-enhanced MRI
✍ Deanna L. Langer; Theodorus H. van der Kwast; Andrew J. Evans; John Trachtenberg 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 541 KB

## Abstract ## Purpose To develop a multi‐parametric model suitable for prospectively identifying prostate cancer in peripheral zone (PZ) using magnetic resonance imaging (MRI). ## Materials and Methods Twenty‐five radical prostatectomy patients (median age, 63 years; range, 44–72 years) had T2‐

Assessment of tumor blood flow in breast
Assessment of tumor blood flow in breast tumors with T1-dynamic contrast-enhanced MR Imaging: Impact of dose reduction and the use of a prebolus technique on diagnostic efficacy
✍ Smitha Makkat; Robert Luypaert; Steven Sourbron; Tadeusz Stadnik; Johan De Mey 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 275 KB 👁 1 views

## Abstract ## Purpose: To prospectively evaluate whether dose reduction and the application of a prebolus technique can effectively alleviate signal saturation effects in T1 dynamic contrast enhanced (T1‐DCE) magnetic resonance imaging (MRI) data in breast tumors and lead to increased diagnostic