Pulmonary Nodules and Emphysema
Conditions
Interventions
Standard-dose CT:Standard-dose CT scan: 100kvp smart MA 200-1080, NI: 10
Low/ultra-low dose CT scan:According to BMI (L:BMI < 18.5 kg/m2
M:18.5 kg/m2 = BMI < 24.0 kg/m2
H:24.0 kg/m2 = BMI < 28.0 kg/m2
F: low-dose CT scan with BMI = 28.0 kg/m2): 100Kvp from 25 mAs to 20 mAs or less in L group, 35 mAs to 30 mAs or less in M group, 45 mAs to 35 mAs or less in H group, and 55 mAs to 40 mAs or less in F
Sponsors
Panyu Central Hospital, Affiliated to Guangzhou Medical University
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: (a) Individuals aged 18 years or older; (b) Presence of a clear image with no motion artifacts or metallic artifacts; (c) Voluntarily sign the informed consent form.
Exclusion criteria
Exclusion criteria: (a) Poor image quality caused by motion or breathing artifacts; (b) The image reconstruction sequence is incomplete; (c) The number of pulmonary nodules on standard-dose CT>=50 patients.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Lung nodule size (maximum long-axis diameter);Lung nodule volume;Detection rate of pulmonary nodules; | — |
Secondary
| Measure | Time frame |
|---|---|
| Location of pulmonary nodules;Type of nodule;Nodule weight;CT mean of nodules;Nodule compactness;Nodule sphericity;Maximum layer area of nodules;Probability of malignant nodules;Lung-RADS;Image signal-to-noise ratio(SNR);Contrast-to-noise ratio(CNR);Image noise values in patients with emphysema;Emphysema index;Total lung volume (TLV);Mean dose of lung attenuation; | — |
Countries
China
Contacts
Public ContactXiang Zhiming
Panyu Central Hospital, Affiliated to Guangzhou Medical University
Outcome results
None listed