Table 1 Comparison of three common imaging methods in diagnosing ICAS-LVO

Strength:

1. Higher accuracy

Strength:

1. Higher accuracy

Weakness:

1. Later than treatment

2. Treatment dependent

Weakness:

1. Later than treatment

2. Treatment dependent

Strength:

1. Early diagnosis

2. Treatment independent

Strength:

1. Rapid

2. Lower hardware requirement

3. Usually routinely performed

Weakness:

1. Less accuracy (based on current knowledge)

Weakness:

1. Less informative about the occlusion site

2. Invasive process

3. Radiation

Strength:

1. Early diagnosis

2. Treatment independent

Strength:

1. More informative about the occlusion site

2. Usually noninvasive

3. Without radiation

Weakness:

1. Time-consuming

2. Higher equipment requirement

3. Unsuitable for patients with magnetic sensitive implant

Weakness:

1. Time-consuming

2. Higher hardware requirement

3. Unsuitable for patients with magnetic sensitive implant

4. Require strict immobilization of the patient