Radiological Physics and Technology OnlineFirst articles

17.04.2024 | Research Article

Evaluation of hafnium oxide nanoparticles imaging characteristics as a contrast agent in X-ray computed tomography

This research aimed to compare the quantitative imaging attributes of synthesized hafnium oxide nanoparticles (NPs) derived from UiO-66-NH2(Hf) and two gadolinium- and iodine-based clinical contrast agents (CAs) using cylindrical phantom. Aqueous …

verfasst von:: Arash Safari, Maziyar Mahdavi, Reza Fardid, Alireza Oveisi, Reza Jalli, Masoud Haghani

13.04.2024 | Technical Note

Simulation of time–intensity curve based on k-space filling in breast dynamic contrast-enhanced three-dimensional magnetic resonance imaging

This study elucidated the effects of a three-dimensional k-space trajectory incorporating the partial Fourier (PF) technique on a time–intensity curve (TIC) in a dynamic contrast-enhanced magnetic resonance imaging of a typical malignant breast …

verfasst von:: Yasuo Takatsu, Tsuyoshi Ueyama, Takahiro Iwasaki, Tomoko Tateyama, Tosiaki Miyati

12.04.2024 | Letter to the Editor

Cameron’s impact on space biomedical sciences—expanding insights to Ng and Doi’s article

verfasst von:: Alireza Mortazavi, S. M. J. Mortazavi

05.04.2024 | Research Article

Patient radiation exposure dose reduction using stent-enhanced image processing in percutaneous coronary intervention

We investigated the reduction in patient radiation exposure dose during percutaneous coronary intervention (PCI) by stent enhancement processing. We examined the effects of dose reduction based on the image quality of stent enhancement processing …

verfasst von:: Kazuya Mori, Toru Negishi, Kouhei Makabe, Ryou Sekiguchi, Takuji Tsuchida

03.04.2024 | Technical Note

Monte carlo simulation study on the dose and dose-averaged linear energy transfer distributions in carbon ion radiotherapy

Dose-averaged linear energy transfer (LETd) is conventionally evaluated from the relative biological effectiveness (RBE)-LETd fitted function used in the treatment planning system. In this study, we calculated the physical doses and their linear …

verfasst von:: Akihisa Ishikawa, Yusuke Koba, Takuya Furuta, Weishan Chang, Shunsuke Yonai, Shinnosuke Matsumoto, Shintaro Hashimoto, Yuta Hirai, Tatsuhiko Sato

Open Access 28.03.2024 | Research Article

An image-based metal artifact reduction technique utilizing forward projection in computed tomography

The projection data generated via the forward projection of a computed tomography (CT) image (FP-data) have useful potentials in cases where only image data are available. However, there is a question of whether the FP-data generated from an image …

verfasst von:: Katsuhiro Ichikawa, Hiroki Kawashima, Tadanori Takata

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26.03.2024 | Research Article

Native myocardial T1 mapping using inversion recovery T1-weighted turbo field echo sequence

This study proposes the use of the inversion recovery T1-weighted turbo field echo (IR-T1TFE) sequence for myocardial T1 mapping and compares the results obtained with those of the modified Look-Locker inversion recovery (MOLLI) method for …

verfasst von:: Katsuhiro Kida, Takamasa Kurosaki, Ryohei Fukui, Ryutaro Matsuura, Sachiko Goto

25.03.2024 | Technical Note

Setup time analysis for stereotactic body radiotherapy in O-ring linear accelerator without rotational correction

This study analyse setup time (ST) and frequency of on-board imaging for stereotactic abdomen (liver, stomach), lung, and spine radiotherapy in the absence of automatic rotational correction. Total 53 stereotactic body radiotherapy (SBRT) …

verfasst von:: Biplab Sarkar, Anirudh Pradhan

22.03.2024 | Research Article

Feasibility study of radioactivity estimation of 99mTc and 123I-labeled radiopharmaceuticals using shielded syringes

This study investigates the feasibility of estimating the radioactivity of radiopharmaceuticals using shielded syringes. The radioactivities of 99mTc-MDP, 99mTc-HMDP, 99mTc-ECD, 99mTc-MAG3, and 123I-IMP were measured using a dose calibrator.

verfasst von:: Yuto Nakamura, Narumi Yasuno

16.03.2024 | Research Article

Commissioning and dosimetric verification of volumetric modulated arc therapy for multiple modalities using electronic portal imaging device-based 3D dosimetry system: a novel approach

The purpose of this study was to validate an electronic portal imaging device (EPID) based 3-dimensional (3D) dosimetry system for the commissioning of volumetric modulated arc therapy (VMAT) delivery for flattening filter (FF) and flattening …

verfasst von:: Raghavendra Hajare, Sreelakshmi K K, Anil Kumar, Rituraj Kalita, Shanmukhappa Kaginelli, Umesh mahantshetty

Open Access 16.03.2024 | Correction

Correction to: Deep learning-based PET image denoising and reconstruction: a review

verfasst von:: Fumio Hashimoto, Yuya Onishi, Kibo Ote, Hideaki Tashima, Andrew J. Reader, Taiga Yamaya

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Open Access 11.03.2024 | Research Article

Long-term geometric quality assurance of radiation focal point and cone-beam computed tomography for Gamma Knife radiosurgery system

To investigate the geometric accuracy of the radiation focal point (RFP) and cone-beam computed tomography (CBCT) over long-term periods for the ICON Leksell Gamma Knife radiosurgery system. This phantom study utilized the ICON quality assurance …

verfasst von:: Shingo Ohira, Toshikazu Imae, Masanari Minamitani, Atsuto Katano, Atsushi Aoki, Takeshi Ohta, Motoyuki Umekawa, Yuki Shinya, Hirotaka Hasegawa, Teiji Nishio, Masahiko Koizumi, Hideomi Yamashita, Nobuhito Saito, Keiichi Nakagawa

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09.03.2024 | Research Article

Denoising parameter dependence of coronary artery depictability in compressed sensing magnetic resonance angiography

Using numerical indices and visual evaluation, we evaluated the dependence of coronary-artery depictability on the denoising parameter in compressed sensing magnetic resonance angiography (CS-MRA). This study was conducted to clarify the …

verfasst von:: Junji Takahashi, Yoshio Machida, Kei Fukuzawa, Yoshinori Tsuji, Yuki Ohmoto-Sekine

27.02.2024 | Research Article

Subjective and objective image quality of low-dose CT images processed using a self-supervised denoising algorithm

This study aimed to assess the subjective and objective image quality of low-dose computed tomography (CT) images processed using a self-supervised denoising algorithm with deep learning. We trained the self-supervised denoising model using …

verfasst von:: Yuya Kimura, Takeru Q. Suyama, Yasuteru Shimamura, Jun Suzuki, Masato Watanabe, Hiroshi Igei, Yuya Otera, Takayuki Kaneko, Maho Suzukawa, Hirotoshi Matsui, Hiroyuki Kudo

23.02.2024 | Research Article

Improved detection of cholesterol gallstones using quasi-material decomposition images generated from single-energy computed tomography images via deep learning

In this study, we developed a method for generating quasi-material decomposition (quasi-MD) images from single-energy computed tomography (SECT) images using a deep convolutional neural network (DCNN). Our aim was to improve the detection of …

verfasst von:: Kojiro Nishijima, Junji Shiraishi

17.02.2024 | Technical Note

Improving image quality using the pause function combination to PROPELLER sequence in brain MRI: a phantom study

While some MRI systems offer a “pause” function, combining it with the PROPELLER method for image quality improvement remains underexplored. This study investigated whether repositioning the head after pausing during PROPELLER imaging enhances …

verfasst von:: Kousaku Saotome, Koji Matsumoto, Yoshiaki Kato, Yoshihiro Ozaki, Motohiro Nagai, Tomoyuki Hasegawa, Hiroki Tsuchiya, Tensho Yamao

Open Access 13.02.2024 | Research Article

3D-printed boluses for radiotherapy: influence of geometrical and printing parameters on dosimetric characterization and air gap evaluation

The work investigates the implementation of personalized radiotherapy boluses by means of additive manufacturing technologies. Boluses materials that are currently used need an excessive amount of human intervention which leads to reduced …

verfasst von:: Simone Giovanni Gugliandolo, Shabarish Purushothaman Pillai, Shankar Rajendran, Maria Giulia Vincini, Matteo Pepa, Floriana Pansini, Mattia Zaffaroni, Giulia Marvaso, Daniela Alterio, Andrea Vavassori, Stefano Durante, Stefania Volpe, Federica Cattani, Barbara Alicja Jereczek-Fossa, Davide Moscatelli, Bianca Maria Colosimo

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Live-Webinar: Aktuelle Leitlinien bei Herz-Kreislauf-Erkrankungen

Springer Medizin