What is the effective temporal resolution of modern CT scanner?
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The effective temporal resolution of modern CT scanners varies depending on the technology and design. Different studies have highlighted various approaches to improving temporal resolution. For instance, studies have shown that ultra-high-resolution CCTA with dual-source photon-counting detector CT can achieve image temporal resolutions of 125 milliseconds and 66 milliseconds, resulting in superior image quality with reduced artifacts and improved sharpness . Additionally, innovative methods like Prior Image Constrained Compressed Sensing (PICCS) have been proposed to enhance temporal resolution by approximately a factor of 2 for all MDCT scanners without hardware modifications, allowing for reliable coronary CT imaging even at higher heart rates . These advancements showcase the continuous efforts to enhance temporal resolution in modern CT scanners for improved diagnostic imaging.
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| Papers (5) | Insight |
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97 Citations | The effective temporal resolution of modern CT scanners can be improved by approximately a factor of 2 using Prior Image Constrained Compressed Sensing (PICCS) reconstruction method. |
2 Citations | The effective temporal resolution of modern CT scanners can be as low as 83 milliseconds with dual-source CT scanners, providing higher image quality compared to 64-detector row scanners. |
| The effective temporal resolution (eTR) of modern CT scanners varies based on reconstruction modes; for non-helical volume scanning, the half reconstruction mode showed higher eTR compared to full and APMC reconstructions. | |
11 Citations | The new CT system architecture proposed in the paper can achieve complete data acquisition for a transaxial slice in 50 ms or less, significantly improving temporal resolution capabilities. |
| The effective temporal resolution of modern CT scanners, particularly in ultra-high-resolution coronary angiography, is crucial for reducing motion artifacts and enhancing vessel and stent sharpness. |
Related Questions
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When did the term 'time to CT' first appear in the literature?4 answersThe term "time to CT" refers to the interval between a patient's arrival at a healthcare facility and the moment they undergo a computed tomography (CT) scan. This metric is particularly significant in the management of acute conditions such as stroke, where rapid diagnosis and treatment initiation are crucial for optimal outcomes. The concept of "time to CT" has become increasingly important in clinical practice and research, as evidenced by its discussion across various studies and reviews.
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Throughout the decades, the evolution of CT technology has seen significant milestones, from the initial innovations in the 1970s to the rapid developments of spiral CT and multirow detectors in the 1990s. The introduction of real-time CT in 1993 further enhanced the utility of CT scans in clinical settings by allowing for real-time reconstruction and display of images, optimizing scan timing in contrast studies, and guiding procedures such as biopsies. These advancements have underscored the importance of timely CT scanning in diagnosing and managing various conditions.
In the context of stroke, the significance of "time to CT" is highlighted by studies focusing on the timing of CT scans post-admission and its impact on patient outcomes. For instance, research has shown that the time from admission to CT scan is crucial for instituting appropriate hyperacute management in stroke, with older patients often experiencing longer delays. The effectiveness of stroke thrombolysis, a key treatment, is highly dependent on the timeliness of administration, further emphasizing the importance of reducing "time to CT".
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Suitable filter for CT images ?3 answersStep 1: Answer without citation
The suitable filter for CT images is the selective mean filter (SMF) proposed by Anam et al. It effectively suppresses noise while preserving spatial resolution, outperforming other filters like the adaptive mean filter (AMF) and bilateral filter (BF). The SMF method reduces noise by up to 75% and maintains spatial resolution similar to the original images and those filtered with the BF. Additionally, the filter is simple and convenient to operate, making it an ideal candidate for CT images.
Step 3: Answer with citation
The suitable filter for CT images is the selective mean filter (SMF) proposed by Anam et al. It effectively suppresses noise while preserving spatial resolution, outperforming other filters like the adaptive mean filter (AMF) and bilateral filter (BF). The SMF method reduces noise by up to 75% and maintains spatial resolution similar to the original images and those filtered with the BF. Additionally, the filter is simple and convenient to operate, making it an ideal candidate for CT images.
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