Hjalmer Danielson

IS
Big data and its relevance to medical imaging
"Big data" is a buzzword you'll be seeing a lot over the next few years as your corporate executive team and healthcare vendors incorporate it into their business development activities. Hjalmer Danielson from Ascendian Healthcare Consulting helps give some definition to the term in this new column.
November 7, 2013
2013 05 31 14 24 53 75 Ascendian Logo 200
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Lung Cancer
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What causes lung cancers to be missed on screening?
Incomplete smoking history documentation appears to be one of the reasons.
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Molecular Imaging
Early PET/CT feasible in women with suspected breast cancer
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Womens Imaging
Study highlights risk-based breast cancer screening; ACR responds
At RSNA 2025, thoracic radiologists debated using autonomous AI for chest radiograph interpretation. They also fielded many audience questions and comments as well.
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Is AI ready for autonomous reads of chest x-rays?
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Patients support AI in radiology, but not as a standalone reader
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Early PET/CT feasible in women with suspected breast cancer
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Study highlights risk-based breast cancer screening; ACR responds
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A study showing the potential benefits of risk-based breast cancer screening has drawn criticism from the ACR.
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Is AI ready for autonomous reads of chest x-rays?
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A debate at RSNA 2025 reviewed the current use of autonomous AI for chest radiographs and assessed future opportunities.
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At RSNA 2025, thoracic radiologists debated using autonomous AI for chest radiograph interpretation. They also fielded many audience questions and comments as well.
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Phase I trial reveals the potential of a new PSMA-PET tracer
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The radiotracer detected more lesions in men with metastatic disease than F-18 piflufolastat.
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Scans in a 73-year-old man with biochemically recurrent prostate cancer (prostate-specific antigen level of 0.5 ng/mL) who underwent PET/CT with 9.4 mCi of F-18 piflufolastat and a second PET/CT examination with 8.1 mCi of copper 61-NODAGA (1,4,7-triazacyclononane,1-glutaric acid-4,7-acetic acid)–prostate-specific membrane antigen for imaging and therapy (Cu-61 PSMA I&T) 24 days apart, with no intervening therapy. Maximum intensity projection (MIP) images obtained (A) 1 hour after F-18 piflufolastat administration and (B) 1, (C) 2, and (D) 4 hours after Cu-61 PSMA I&T administration are shown. Physiologic uptake is seen in the lacrimal glands, salivary glands, liver, spleen, kidneys, ureters, and bladder. Pathologic uptake in pelvic nodal metastases is labeled with arrows. The F-18 piflufolastat PET/CT MIP image reveals two avid pelvic nodal metastases (arrows). Cu-61 PSMA I&T PET/CT scans demonstrate three avid pelvic nodal metastases on 1-hour and 2-hour images (arrows); five avid pelvic nodal metastases were suspected on the 4-hour image (arrows).
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Breast radiologists achieved moderate to substantial interreader agreement for classifying nonmass lesions on ultrasound.
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Images depict a 50-year-old woman with a lesion detected during screening ultrasound. (A) Transverse and (B) longitudinal images reveal a 0.5-cm hypoechoic lesion (arrow) in the left breast. (C) Transverse color Doppler ultrasound image does not show an increase in vascularity. Two readers classified the lesion as a mass, whereas two others categorized it as a nonmass lesion, leading to its designation as a controversial nonmass lesion. Ultrasound-guided core needle biopsy and subsequent pathologic examination confirmed a nonproliferative breast change.
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