Create app.py

app.py

@@ -1,3 +1,25 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bb1161037fd3eb081bd36ecf5c134132270b9e13ddd6d3f74ca5ccdb30f63f15
-size 1812
+import gradio as gr
+import numpy as np
+
+def calculate_tia(t1, a1, t2, a2):
+    try:
+        k = np.log(a1 / a2) / (t2 - t1)
+        a0 = a1 / np.exp(-k * t1)
+        tia = a0 / k
+        return f"A₀ = {a0:.2f} MBq\nk = {k:.5f} /h\nTIA = {tia:.2f} MBq·h"
+    except:
+        return "Error: please enter valid numbers."
+
+with gr.Blocks() as demo:
+    gr.Markdown("## Lu-177 Dosimetry Tool (Two-Time-Point TIA)")
+    with gr.Row():
+        t1 = gr.Number(label="Time Point 1 (hours)", value=20)
+        a1 = gr.Number(label="Activity at t1 (MBq)", value=12)
+    with gr.Row():
+        t2 = gr.Number(label="Time Point 2 (hours)", value=60)
+        a2 = gr.Number(label="Activity at t2 (MBq)", value=4)
+    output = gr.Textbox(label="Results", lines=4)
+    button = gr.Button("Calculate TIA")
+    button.click(fn=calculate_tia, inputs=[t1, a1, t2, a2], outputs=output)
+
+demo.launch()