Imaging Liver Lesions Using Grating-Based Phase-Contrast Computed Tomography with Bi-Lateral Filter Post-Processing
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{"title"=>"Imaging liver lesions using grating-based phase-contrast computed tomography with bi-lateral filter post-processing", "type"=>"journal", "authors"=>[{"first_name"=>"Julia", "last_name"=>"Herzen", "scopus_author_id"=>"16230000800"}, {"first_name"=>"Marian S.", "last_name"=>"Willner", "scopus_author_id"=>"36669669000"}, {"first_name"=>"Alexander A.", "last_name"=>"Fingerle", "scopus_author_id"=>"6508034290"}, {"first_name"=>"Peter B.", "last_name"=>"Noël", "scopus_author_id"=>"7102245720"}, {"first_name"=>"Thomas", "last_name"=>"Köhler", "scopus_author_id"=>"7102921784"}, {"first_name"=>"Enken", "last_name"=>"Drecoll", "scopus_author_id"=>"14628270700"}, {"first_name"=>"Ernst J.", "last_name"=>"Rummeny", "scopus_author_id"=>"16690373900"}, {"first_name"=>"Franz", "last_name"=>"Pfeiffer", "scopus_author_id"=>"7102420628"}], "year"=>2014, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-84898405799", "pui"=>"372817946", "doi"=>"10.1371/journal.pone.0083369", "sgr"=>"84898405799", "pmid"=>"24465378"}, "id"=>"45d7a933-15ac-3f12-8ebf-2237a1f71f9d", "abstract"=>"X-ray phase-contrast imaging shows improved soft-tissue contrast compared to standard absorption-based X-ray imaging. Especially the grating-based method seems to be one promising candidate for clinical implementation due to its extendibility to standard laboratory X-ray sources. Therefore the purpose of our study was to evaluate the potential of grating-based phase-contrast computed tomography in combination with a novel bi-lateral denoising method for imaging of focal liver lesions in an ex vivo feasibility study. Our study shows that grating-based phase-contrast CT (PCCT) significantly increases the soft-tissue contrast in the ex vivo liver specimens. Combining the information of both signals--absorption and phase-contrast--the bi-lateral filtering leads to an improvement of lesion detectability and higher contrast-to-noise ratios. The normal and the pathological tissue can be clearly delineated and even internal structures of the pathological tissue can be visualized, being invisible in the absorption-based CT alone. Histopathology confirmed the presence of the corresponding findings in the analyzed tissue. The results give strong evidence for a sufficiently high contrast for different liver lesions using non-contrast-enhanced PCCT. Thus, ex vivo imaging of liver lesions is possible with a polychromatic X-ray source and at a spatial resolution of ∼100 µm. The post-processing with the novel bi-lateral denoising method improves the image quality by combining the information from the absorption and the phase-contrast images.", "link"=>"http://www.mendeley.com/research/imaging-liver-lesions-using-gratingbased-phasecontrast-computed-tomography-bilateral-filter-postproc", "reader_count"=>36, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>3, "Researcher"=>3, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>9, "Student > Master"=>13, "Other"=>3, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>3, "Researcher"=>3, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>9, "Student > Master"=>13, "Other"=>3, "Professor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>5, "Unspecified"=>3, "Agricultural and Biological Sciences"=>1, "Medicine and Dentistry"=>5, "Arts and Humanities"=>1, "Business, Management and Accounting"=>1, "Physics and Astronomy"=>18, "Computer Science"=>2}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>5}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>5}, "Physics and Astronomy"=>{"Physics and Astronomy"=>18}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>1}, "Computer Science"=>{"Computer Science"=>2}, "Business, Management and Accounting"=>{"Business, Management and Accounting"=>1}, "Unspecified"=>{"Unspecified"=>3}, "Arts and Humanities"=>{"Arts and Humanities"=>1}}, "group_count"=>2}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1350693"], "description"=>"<p>Conventional absorption-based (A, D) and phase-contrast (B, E) CT images of the liver specimen in two different planes. H&E stain (C) corresponds to image A and B, respectively. (F) shows the histogram of the filtered absorption image (top) and the filtered phase-contrast image (bottom) with red dashed lines marking the window level in the shown slices. The absorption images (A, D) profit strongly from the filtering, but the information is still complementary.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "slices", "cholangiocellular", "carcinoma", "macrosteatosis", "pilosis", "filtered", "3d", "bilateral"], "article_id"=>903584, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g004", "stats"=>{"downloads"=>0, "page_views"=>27, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Tomographic_slices_of_a_cholangiocellular_carcinoma_in_a_liver_with_macrosteatosis_and_pilosis_filtered_with_the_3D_bilateral_filter_/903584", "title"=>"Tomographic slices of a cholangiocellular carcinoma in a liver with macrosteatosis and pilosis filtered with the 3D bilateral filter.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350706"], "description"=>"<p>Conventional absorption-based (A, D) and phase-contrast (B, E) CT images of the liver specimen in two different planes. H&E stain (C) corresponds to image A and B, respectively, and (F) shows the histograms of both signals with red dashed lines marking the window level. In the absorption images (A, C) only the mucinous parts of the metastasis are visible as areas with low density. The phase-contrast images (B, E) show a significantly higher soft-tissue contrast with low signal in the mucinous areas, intermediate signal in the liver tissue and higher signal for the tumor tissue and necrotic/hemorrhagic areas.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "tomographic", "slices", "metastasis", "mucinous", "adenocarcinoma"], "article_id"=>903597, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g007", "stats"=>{"downloads"=>0, "page_views"=>26, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Filtered_tomographic_slices_of_a_liver_metastasis_of_a_mucinous_adenocarcinoma_of_the_colon_/903597", "title"=>"Filtered tomographic slices of a liver metastasis of a mucinous adenocarcinoma of the colon.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350685"], "description"=>"<p>Conventional absorption-based (A, D) and phase-contrast (B, E) CT images of the liver specimen in two different planes. H&E stain (C) corresponds to image A and B, respectively. (F) shows the histogram of the filtered absorption image (top) and the filtered phase-contrast image (bottom) with red dashed lines marking the window level in the shown slices.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "tomographic", "slices", "metastasis", "low-grade", "adenocarcinoma", "steatotic", "filtered", "3d", "bilateral"], "article_id"=>903578, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g003", "stats"=>{"downloads"=>0, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Filtered_tomographic_slices_of_a_metastasis_of_a_low_grade_adenocarcinoma_in_a_steatotic_liver_filtered_with_the_3D_bilateral_filter_/903578", "title"=>"Filtered tomographic slices of a metastasis of a low-grade adenocarcinoma in a steatotic liver filtered with the 3D bilateral filter.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350699"], "description"=>"<p>The patient had received transcatheter arterial chemoembolisation (TACE). Conventional absorption-based (A, D) and phase-contrast (B, E) CT images of the liver specimen in two different planes. H&E stain (C) corresponds to image A and B, respectively, and (F) shows the histogram of the absorption (top) and the phase-contrast image (bottom) with red dashed lines marking the window level. In the absorption images (A, D) the HCC nodules in the right center (marked with red arrows in A) are visible due to the high density of the retained Lipiodol. In the phase-contrast images (B, D) the fibrous septa are visible as high signal bands whereas the liver tissue and the HCC nodules show intermediate signal. Some areas with increased Lipiodol retention show low signal.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "tomographic", "slices", "hepatocellular", "carcinoma", "cirrhotic"], "article_id"=>903590, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g005", "stats"=>{"downloads"=>0, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Filtered_tomographic_slices_of_a_hepatocellular_carcinoma_in_a_cirrhotic_liver_/903590", "title"=>"Filtered tomographic slices of a hepatocellular carcinoma in a cirrhotic liver.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350707"], "description"=>"<p>For the calculation of the CNRs the areas I (red, surrounding formalin) and II (blue, high-contrast tumor) marked in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083369#pone-0083369-g002\" target=\"_blank\">Figure 2B</a> were used, which correspond to 30×30 pixels.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "cnrs", "unfiltered", "filtered", "tomographic", "slices", "metastasis", "low-grade", "adenocarcinoma", "steatotic"], "article_id"=>903598, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.t001", "stats"=>{"downloads"=>2, "page_views"=>16, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_CNRs_for_unfiltered_and_filtered_tomographic_slices_of_a_metastasis_of_a_low_grade_adenocarcinoma_in_a_steatotic_liver_shown_in_Figure_2_/903598", "title"=>"Comparison of CNRs for unfiltered and filtered tomographic slices of a metastasis of a low-grade adenocarcinoma in a steatotic liver shown in Figure 2.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350703"], "description"=>"<p>Conventional absorption- based (A, D) and phase-contrast (B, E) CT images of the liver specimen in two different planes. H&E stain (C) corresponds to image A and B, respectively, and the histogram (F) of the absorption (top) and the phase-contrast image (bottom) show the window level as red dashed lines. In the absorption images (A, D) the contrast between the liver tissue in the upper right part of the image (A, D) and the subcapsular hematoma in the lower left part is considerably lower compared to the phase-contrast image (B, E) where the hematoma shows a high signal.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "tomographic", "slices", "subcapsular"], "article_id"=>903594, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g006", "stats"=>{"downloads"=>0, "page_views"=>13, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Filtered_tomographic_slices_of_a_subcapsular_hematoma_/903594", "title"=>"Filtered tomographic slices of a subcapsular hematoma.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350681"], "description"=>"<p>Axial slices of the conventional absorption-based (A, D) and the phase-contrast (B, E) tomography windowed using the same window level and window width. The histograms of both unfiltered (C) and filtered (F) tomographic datasets demonstrate the filtering result and the red dashed markers show the window level. The areas I (red, surrounding formalin) and II (blue, high-contrast tumor in (B) mark the regions of 30×30 pixels, which were averaged for CNR calculation.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "unfiltered", "filtered", "tomographic", "slices", "metastasis", "low-grade", "adenocarcinoma", "steatotic"], "article_id"=>903574, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g002", "stats"=>{"downloads"=>1, "page_views"=>20, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_unfiltered_and_filtered_tomographic_slices_of_a_metastasis_of_a_low_grade_adenocarcinoma_in_a_steatotic_liver_/903574", "title"=>"Comparison of unfiltered and filtered tomographic slices of a metastasis of a low-grade adenocarcinoma in a steatotic liver.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}
  • {"files"=>["https://ndownloader.figshare.com/files/1350678"], "description"=>"<p>A) Schematic top view of the grating-based imaging setup. The X-ray tube is a rotating anode with a Molybdenum target working with max. 60 kVp and 80 mA. The grating-interferometer consists of a source grating (to increase the coherence), a phase grating, an analyzer grating and a detector. The specimen is rotated in this setup. B) Photograph of the grating-based PCCT setup using conventional X-ray sources consisting of three gratings arranged in a symmetrical setup: (a) source grating marked yellow, (b) phase grating marked purple and (c) analyzer grating marked red, (d) the specimen mounted to a hanging rotation stage and (e) the detector. A red arrow marks the X-ray beam path.</p>", "links"=>[], "tags"=>["signal processing", "Image processing", "Diagnostic medicine", "Gastroenterology and hepatology", "Gastrointestinal cancers", "Liver diseases", "oncology", "Cancers and neoplasms", "Gastrointestinal tumors", "Cancer detection and diagnosis", "radiology", "Diagnostic radiology", "Computed tomography", "Interdisciplinary physics", "Medical physics", "grating-based", "imaging"], "article_id"=>903571, "categories"=>["Physics", "Medicine", "Engineering"], "users"=>["Julia Herzen", "Marian S. Willner", "Alexander A. Fingerle", "Peter B. Noël", "Thomas Kohler", "Enken Drecoll", "Ernst J. Rummeny", "Franz Pfeiffer"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0083369.g001", "stats"=>{"downloads"=>0, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Schematic_and_a_photograph_of_the_grating_based_imaging_setup_/903571", "title"=>"Schematic and a photograph of the grating-based imaging setup.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-01-17 03:33:19"}

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Relative Metric

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