Maitiro ekugadzirisa chiridzwa panguva yekuongororwa kwe ultrasound (ine nhanho-ne-nhanho tsananguro- Chikamu 2)

2.CDFI

·Kushandiswa kweCDFI: Tarisa tsinga dzeropa, tsvaga chimiro chepombi,

Ziva tsinga uye tsinga, ratidza kwakabva uye negwara rekuyerera kweropa,

Nguva yenguva, inoratidza chimiro chekuyerera kweropa, inoratidza kukurumidza kubuda kweropa

Inononoka, inotungamirwa inotaridzika Doppler sampling chinzvimbo

1) CDFI yakagadziridzwa yemukati (mavara matsvuku):

2) CDFI haiwanzo gadzirisa zvirimo

Total gain:

 

Saizi yebhokisi remavara uye chinzvimbo

Musiyano wemufananidzo pakati peyakanyanya, yakaderera uye ine mwero Chikero

Ruvara sampling furemu deflection angle steer

Kutsauka uchitevedza nzira yetsinga yeropa kuti ropa riyerere mugomba rizere uye rigutse.

Mubvunzo 1: Nzira yekugadzirisa sei ultrasound parameters kuratidza kuderera-kumhanya kweropa?

1. Wedzera---kuwana

2. Deredza --- spidhi sikero CHIKAMU

3. Wedzera --- inzwi rinobuda Output Power

4. Wedzera --- furemu pakati

6. Deredza---sampling area

6. Deredza --- nhamba yenzvimbo dzekutarisisa (optimize tarisiro)

7. Deredza --- chinhambwe

Deredza--sampling area show:

Mubvunzo 2: Nzira yekuderedza kubuda ropa uye kubvisa aliasing?

1. Kuderedza--kuwana

2. Wedzera--speed scale SCALE

Mubvunzo 3: Nzira yekuwedzera sei furemu chiyero?

1. Deredza --- B mode size

2. Deredza --- kudzika

3. Deredza --- ruvara sampling furemu

4. Deredza --- furemu pakati

5. Deredza --- nhamba yezvibodzwa

6. Deredza --- nhambwe yekuona

3. Spectral Doppler kugadzirisa nzira

1. Nzira yekushanda: Kana chiyero chekuyerera chisina kukwirira, sarudza PW, kana chiyero chekuyerera chiri pamusoro, sarudza CW.

2. Mamiriro ekugadzirisa: Low-pass filtering inoshandiswa kuderera-kumhanya kweropa, uye high-pass filtering inoshandiswa pakuyerera kweropa.

3. Speed ​​​​scale: Sarudza chiyero chekumhanya chinoenderana neanoonekwa kubuda kweropa.

4. Sampling gonhi: kuona mitsipa yeropa, sampling gonhi ≤ tsinga yeropa mukati medhayamita.Tarisa intracardiac valves

Mukova wesampling gonhi uri pakati nepakati.

5. Zero baseline: kufambisa yekutanga kunogona kuwedzera kuyerwa kwechiyero mune imwe nzira uye kudzivirira kukanganisa.

Iye zvino akazivikanwa.

6. Chiratidzo chefrequency shift flips up and down: zviri nyore kuyera, chiridzwa chinozviputira spectrum waveform.

7. Chiitiko chekona: kuongorora kwemwoyo ≤ 20, midziyo yeropa yeperipheral ≤ 60, uye kona inofanira kugadziriswa.

8. Kutapurirwa kwepamusoro: Kuwedzerwa kwepamusoro kunoshandiswa kune yakaderera-yekuyerera kweropa, uye yakaderera inoshandiswa pakuyerera kwepamusoro-kumhanya kweropa.

PW inowanzogadzirisa zvinyorwa

Kana iyo PW kuwana yakakura kwazvo

Kana huwandu hwacho huri pakati nepakati, hwakaderera kana hwakanyanya

Sampling gonhi saizi

1. Kana gonhi resampling rakamanikana, pane musiyano mudiki mukuyerera kwevelocity pakati pezvikamu zviri pedyo, iyo "vt" curve idiki, uye hwindo rakakura.

2. Kana gonhi rekuenzanisa richivhara lumen yose, hwindo "rakazadzwa zvakakwana"

gadziriso yekutanga yakakwira zvakanyanya kanazvakarelow:

Mubvunzo wechishanu: Nzira yekuwedzera sei PW&CW kunzwa

1. Wedzera kuwana

2. Wedzera kubuda kwezwi

3. Wedzera sampling volume

4. Isa kona yekuongorora zvakakodzera

Cherechedza: Zviridzwa zveUltrasound zvine preset mamiriro uye akakodzera kuongorora nhengo dzakasiyana uye matishu.

Kubva pane zvakagadzirirwa, ita zvigadziriso zvakakodzera maererano nemamiriro chaiwo kuti usangane nezvinodiwa zvekuongorora.