Advantages and disadvantages of various imaging techniques

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Advantages and Disadvantages of Various Imaging Examination Techniques

I.MRI Examination

Advantages:1No

Radiation damage

.2 Multi-parametric imaging with

high contrast

3

Molecular biology

. p>. 2Multi-parametric imaging with

high contrast

3

Improvement in molecular biology

and histologic diagnosis 4No bone

artifacts

5Arbitrary orientation tomography

direct imaging

6Cardiac,

large blood vessels

morphology and

function diagnosis p>functional diagnostic

improvements.7 High sensitivity to water and high-field

nuclear magnetic **** vibration

are far more diagnostic of small cysts.8 Dynamic

enhanced scans

can provide insights into the characteristics of the blood supply to lesions of the kidneys and other organs.9

Contrast media

are iodine-free and are used in small quantities, which makes them particularly suitable for iodine allergy or

renal insufficiency

.

Disadvantages:1 Scanning time is long, and there is a limit to the examination of certain organs and diseases.2 Calcification and stones are poorly displayed, and their presentation on MR images is complex.3 Bony structures are relatively poorly displayed.4 Artifacts are relatively numerous.5 Images are affected by multiple scanning parameters and tissue parameters, and image interpretation is difficult.6 Signal complexity makes some characterization difficult.7

Contraindications

Relative Contraindications

Contraindications and Relative Contraindications

Contraindications are numerous. p>and relative contraindications are many.2.

CT examination

Advantages:1

Density resolution

high.2 It is a

transverse image

, which can be scanned in several consecutive layers, and coronal and sagittal reconstruction is possible.3 The image reconstructed by

electronic computer

does not overlap with that of the neighboring layers.4

It can also be reconstructed in the same manner as that of other layers.5

It can be used to reconstruct images in the same manner as that of other layers. overlap.4

CT values

can provide diagnostic reference values.5 Enhanced scans can provide insight into the blood supply and perfusion status of lesions in the kidneys, liver, and other organs, and are of high qualitative value.

Disadvantages:1 The image

spatial resolution

is not as high as that of an X-ray image.2 A rich knowledge of cross-sectional anatomy is required to view the cross-sectional image.3 There are certain limitations.4 Lesions whose density is similar to that of normal tissue are

easily missed by plain scanning

and must be scanned with an enhancement scan.5 There is an effect of radiation from X-rays

. >

6The use of intravascular iodine-containing

iodine contrast agents

has a risk of iodine allergy.

Three.

X-rays

Advantages and DisadvantagesX-ray methods include:GeneralAdvantages: