Michael Ljungberg
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Explore the profile of Michael Ljungberg including associated specialties, affiliations and a list of published articles.
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79
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1391
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Recent Articles
1.
Ito T, Hitomi K, Ljungberg M, Kawasaki S, Katayama Y, Kato A, et al.
Med Phys
. 2025 Feb;
PMID: 40017160
Background: Single-photon emission computed tomography (SPECT) devices equipped with cadmium-zinc-telluride (CZT) detectors achieve high contrast resolution because of their enhanced energy resolution. Recently, thallium bromide (TlBr) has gained attention as...
2.
Gustafsson J, Larsson E, Ljungberg M, Sjogreen Gleisner K
EJNMMI Phys
. 2024 Jul;
11(1):62.
PMID: 39004644
Background: The aim was to investigate the noise and bias properties of quantitative Lu-SPECT with respect to the number of projection angles, and the number of subsets and iterations in...
3.
Islamian J, Ljungberg M
World J Nucl Med
. 2024 Jun;
23(2):95-102.
PMID: 38933066
The purpose of a parallel-hole collimator in a scintillation camera system is to transmit only those photons that have an emission angle close to the direction of the hole. This...
4.
Morphis M, van Staden J, du Raan H, Ljungberg M, Sjogreen Gleisner K
EJNMMI Phys
. 2024 Jun;
11(1):50.
PMID: 38898326
Purpose: This study aimed to assess the accuracy of patient-specific absorbed dose calculations for tumours and organs at risk in radiopharmaceutical therapy planning, utilizing hybrid planar-SPECT/CT imaging. Methods: Three Monte...
5.
Velo A, Fan P, Xie H, Chen X, Boutagy N, Feher A, et al.
IEEE Trans Radiat Plasma Med Sci
. 2024 May;
7(8):839-850.
PMID: 38745858
SPECT systems distinguish radionuclides by using multiple energy windows. For CZT detectors, the energy spectrum has a low energy tail leading to additional crosstalk between the radionuclides. Previous work developed...
6.
Jessen L, Gustafsson J, Ljungberg M, Curkic-Kapidzic S, Imsirovic M, Sjogreen-Gleisner K
EJNMMI Phys
. 2024 Jan;
11(1):8.
PMID: 38252205
Background: A 3D printing grid-based method was developed to construct anthropomorphic phantoms with non-uniform activity distributions, to be used for evaluation of quantitative SPECT images. The aims were to characterize...
7.
Roth D, Larsson E, Strand J, Ljungberg M, Sjogreen Gleisner K
EJNMMI Phys
. 2024 Jan;
11(1):2.
PMID: 38167976
Background: In image processing for activity quantification, the end goal is to produce a metric that is independent of the measurement geometry. Photon attenuation needs to be accounted for and...
8.
Tran-Gia J, Denis-Bacelar A, Ferreira K, Robinson A, Bobin C, Bonney L, et al.
EJNMMI Phys
. 2023 Nov;
10(1):73.
PMID: 37993667
Introduction: Commissioning, calibration, and quality control procedures for nuclear medicine imaging systems are typically performed using hollow containers filled with radionuclide solutions. This leads to multiple sources of uncertainty, many...
9.
Darami M, Mahmoudian B, Ljungberg M, Islamian J
World J Nucl Med
. 2023 Oct;
22(3):217-225.
PMID: 37854088
Collimators have a significant role in image quality and detectability in single-photon emission computed tomography (SPECT) imaging. Using an appropriate alloy that effectively absorbs scattered photons, without induced secondary x-rays,...
10.
Kalaitzidis P, Gustafsson J, Hindorf C, Ljungberg M
Heliyon
. 2023 Sep;
9(9):e19504.
PMID: 37681181
One example of a PET exam that suffers from noise problems is [Ga]Ga-DOTA-TOC, where patients are generally administered between 100 and 200 MBq [Ga]Ga-DOTA-TOC, irrespective of size. However, a fixed...